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<DIV align="center" style="font-size: 10pt; margin-top: 18pt">As filed with the Securities and Exchange Commission on August&nbsp;18, 2008
</DIV>


<DIV align="right" style="font-size: 10pt; margin-top: 12pt">Registration No.&nbsp;333-<U>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U>
</DIV>


<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>




<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>Washington, DC 20549<BR>
<DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 2px solid #000000">&nbsp;</DIV></DIV></B>
</DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM S-8</B>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>REGISTRATION STATEMENT UNDER<BR>
THE SECURITIES ACT OF 1933</B></DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>FIRST INTERSTATE BANCSYSTEM, INC.</B>
</DIV>

<DIV align="center" style="font-size: 10pt">(Exact name of issuer as specified in its charter)</DIV>


<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
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<TR valign="bottom">
    <TD width="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
</TR>
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<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><B>Montana</B>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>81-0331430</B></TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(State or other Jurisdiction of <BR>
incorporation or organization)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(I.R.S. Employer Identification Number)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt">400 North 31<SUP style="font-size: 85%; vertical-align: text-top">st</SUP> Street, Billings, Montana 59116<BR>
(Address of Principal Executive Offices and Zip Code)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>FIRST INTERSTATE BANCSYSTEM, INC. EMPLOYEE STOCK PURCHASE PLAN, AS AMENDED AND RESTATED</B></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>SAVINGS AND PROFIT SHARING PLAN FOR EMPLOYEES OF FIRST INTERSTATE BANCSYSTEM, INC., 2006<BR>
RESTATEMENT, AS AMENDED</B></DIV>

<DIV align="center" style="font-size: 10pt">(Full titles of plans)</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 12pt">Terrill R. Moore<BR>
Executive Vice President and Chief Financial Officer<BR>
FIRST INTERSTATE BANCSYSTEM, INC.<BR>
401 North 31st Street<BR>
Billings, Montana 59116<BR>
(Name and address of agent for service)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt">(406)&nbsp;255-5390<BR>
(Telephone number, including area code, of agent for service)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt">With a Copy to:<BR>
Holland &#038; Hart LLP<BR>
Attn: David G. Angerbauer, Esq.<BR>
60 East South Temple, Suite&nbsp;2000<BR>
Salt Lake City, Utah 84111<BR>
(801)&nbsp;799-5800</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer,
a non-accelerated filer, or a smaller reporting company.
See the definitions of &#147;large accelerated filer,&#148; &#147;accelerated filer&#148; and &#147;smaller reporting company&#148; in Rule 12b-2 of the Exchange Act. (Check one):</DIV>



<DIV align="center">
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<TR style="font-size: 6pt">
    <TD width="10%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>
</TR>
<TR valign="top">
    <TD nowrap align="center" valign="top">Large accelerated filer
<FONT face="Wingdings">&#111;</FONT>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" valign="top">Accelerated filer <FONT face="Wingdings">&#111;</FONT>&nbsp;</TD>
    <TD align="center">&nbsp;</TD>
    <TD nowrap align="center">Non-accelerated filer &nbsp;
<FONT face="Wingdings">&#254;</FONT><BR>
(Do not check if a smaller reporting company)</TD>
    <TD align="center">&nbsp;</TD>
    <TD nowrap align="center" valign="top">Smaller Reporting Company <FONT face="Wingdings">&#111;</FONT>&nbsp;</TD>
</TR>
</TABLE>
</DIV>





<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>CALCULATION OF REGISTRATION FEE</B></DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="1%">&nbsp;</TD>
    <TD width="54%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>

    <TD width="1%">&nbsp;</TD>
</TR><TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="23" style="border-bottom: 2px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%" style="border-left: 2px solid #000000">&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Proposed</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Proposed</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
    <TD width="1%" style="border-right: 2px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%" style="border-left: 2px solid #000000">&nbsp;</TD>

    <TD nowrap align="center">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Amount to be</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">maximum offering</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">maximum aggregate</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Amount of</TD>
    <TD width="1%" style="border-right: 2px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%" style="border-left: 2px solid #000000">&nbsp;</TD>

    <TD nowrap align="center">Title of securities to be registered (1)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">registered (2)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">price per share (3)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">offering price</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">registration fee</TD>
    <TD width="1%" style="border-right: 2px solid #000000">&nbsp;</TD>
</TR>

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<TR valign="bottom">
    <TD width="1%" style="border-left: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>

<TD valign="top" style="border-top: 2px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">Common Stock (no par value)
</DIV></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD nowrap align="right" valign="top" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" valign="top" style="border-top: 2px solid #000000">2,000,000</TD>
    <TD nowrap valign="top" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD nowrap align="right" valign="top" style="border-top: 2px solid #000000">$</TD>
    <TD align="right" valign="top" style="border-top: 2px solid #000000">77.00</TD>
    <TD nowrap valign="top" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD nowrap align="right" valign="top" style="border-top: 2px solid #000000">$</TD>
    <TD align="right" valign="top" style="border-top: 2px solid #000000">154,000,000</TD>
    <TD nowrap valign="top" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD nowrap align="right" valign="top" style="border-top: 2px solid #000000">$</TD>
    <TD align="right" valign="top" style="border-top: 2px solid #000000">6,052.20</TD>
    <TD nowrap valign="top" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD width="1%" style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="23" style="border-top: 2px solid #000000">&nbsp;</TD>
</TR>

<!-- End Table Body -->
</TABLE>
</DIV>


<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="96">&nbsp;</TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">(1)</TD>
    <TD>&nbsp;</TD>
    <TD>Pursuant to Rule&nbsp;416(a) under the Securities Act of 1933, as amended (the &#147;Securities Act&#148;),
this Registration Statement shall also cover any additional shares of the Registrant&#146;s Common
Stock, no par value, which are issued or become issuable under the First Interstate
BancSystem, Inc. Employee Stock Purchase Plan, as amended and restated, and the Savings and
Profit Sharing Plan for Employees of First Interstate BancSystem, Inc., 2006 Restatement, as
amended, to prevent dilution resulting from any stock split, stock dividend or similar
transactions.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(2)</TD>
    <TD>&nbsp;</TD>
    <TD>In addition, pursuant to Rule 416(c) under the Securities Act, this Registration Statement
also covers an indeterminate amount of interests to be offered or sold pursuant to the Savings
and Profit Sharing Plan for Employees of First Interstate BancSystem, Inc., 2006 Restatement,
as amended.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(3)</TD>
    <TD>&nbsp;</TD>
    <TD>Calculated in accordance with Rule 457(h) under the Securities Act, based upon the latest
appraised value of $77.00 per share as of June&nbsp;30, 2008, as established on August&nbsp;13, 2008.</TD>
</TR>

</TABLE>



<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>





<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>EXPLANATORY NOTE</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Registration Statement on Form S-8 is being filed pursuant to General Instruction E for
Form S-8 under the Securities Act of 1933, as amended (the &#147;Securities Act&#148;), to register 2,000,000
additional shares of the registrant&#146;s common stock available for issuance pursuant to the First
Interstate BancSystem, Inc. Employee Stock Purchase Plan, as amended and restated, and the Savings
and Profit Sharing Plan for Employees of First Interstate BancSystem, Inc., 2006 Restatement, as
amended. This Registration Statement incorporates by reference the contents of the Registrant&#146;s
Registration Statements on Form S-8 related to the plans previously filed on (i)&nbsp;May&nbsp;19, 1998 (Reg.
No.&nbsp;333-53011), and (ii)&nbsp;April&nbsp;22, 1999 (Reg. No.&nbsp;333-76825), including all exhibits and amendments
thereto and all periodic reports of the Registrant that were filed subsequent to the prior Form
S-8s and which are incorporated by reference into such Form S-8s.
</DIV>

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<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>PART II</B>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 6pt"><B>INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Item&nbsp;8.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; EXHIBITS
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="88%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" colspan="3">Regulation S-K</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000">Exhibit</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Document</TD>
</TR>
<TR style="font-size:6pt"><TD>&nbsp;</TD></TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="left" valign="top" colspan="2">4.1(1)</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Form of Shareholder&#146;s Agreement for non-Scott family members dated August&nbsp;19,
2002.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.30</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">First Interstate BancSystem, Inc. Employee Stock Purchase Plan, as amended and
restated effective April&nbsp;30, 2008.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.31</TD>
    <TD nowrap valign="top">(2)</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Savings and Profit Sharing Plan for Employees of First Interstate BancSystem,
Inc., 2006 Restatement.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.32</TD>
    <TD nowrap valign="top">(3)</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">First Amendment to the Savings and Profit Sharing Plan for Employees of First
Interstate BancSystem, Inc., 2006 Restatement.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.33</TD>
    <TD nowrap valign="top">(3)</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Second Amendment to the Savings and Profit Sharing Plan for Employees of First
Interstate BancSystem, Inc., 2006 Restatement.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.34</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Third Amendment to the Savings and Profit Sharing Plan for Employees of First
Interstate BancSystem, Inc., 2006 Restatement.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="left" valign="top">5</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Opinion of Holland&nbsp;&#038; Hart LLP, as to the legality of securities being registered.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">23.1</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Consent of McGladrey &#038; Pullen LLP.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">23.2</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Consent of Holland &#038; Hart LLP (contained in Exhibit&nbsp;5).</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="left" valign="top">24</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Power of Attorney (included on page&nbsp;4 of this Registration Statement).</DIV></TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">* * * * * * * * * * * * * * * * * * * *
</DIV>



<DIV align="left">
<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">(1)</TD>
    <TD>&nbsp;</TD>
    <TD>Incorporated by reference to the Registrant&#146;s Post-Effective Amendment No.&nbsp;2 to
Registration Statement on Form&nbsp;S-8, No.&nbsp;333-76825.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(2)</TD>
    <TD>&nbsp;</TD>
    <TD>Incorporated by reference to the Registrant&#146;s Post-Effective Amendment No.&nbsp;6 to
Registration Statement on Form&nbsp;S-8, No.&nbsp;333-76825.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(3)</TD>
    <TD>&nbsp;</TD>
    <TD>Incorporated by reference to the Registrant&#146;s Post-Effective Amendment No.&nbsp;5 to
Registration Statement on Form&nbsp;S-8, No.&nbsp;333-53011.</TD>
</TR>

</TABLE>



<P align="center" style="font-size: 10pt"><!-- Folio -->3<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">
<!-- link1 "SIGNATURES" -->

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SIGNATURES</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt">1. REGISTRANT
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act, the Registrant certifies that it has
reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has
duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Billings, State of Montana, on August&nbsp;18, 2008.
</DIV>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">First Interstate BancSystem, Inc.<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/ <FONT style="font-variant: SMALL-CAPS">Lyle R. Knight</FONT>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Lyle R. Knight&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">President and Chief Executive Officer&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>POWER OF ATTORNEY</B>
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature to this Registration
Statement appears below hereby constitutes and appoints Lyle R. Knight and Terrill&nbsp;R. Moore, and
each of them, as his true and lawful attorney-in-fact and agent, with full power of substitution,
to sign on his behalf individually and in the capacity stated below, and to perform any acts
necessary to be done in order to file all amendments and post-effective amendments to this
Registration Statement, and any and all instruments or documents filed as part of or in connection
with this Registration Statement or the amendments thereto and each of the undersigned does hereby
ratify and confirm all that such attorney-in-fact and agent, or his substitutes, shall do or cause
to be done by virtue hereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, the Registration Statement has
been signed below by the following persons in the capacities indicated on August&nbsp;18, 2008.
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="30%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="25%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left"><FONT style="font-variant: SMALL-CAPS"><B>Signature</B></FONT></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left"><FONT style="font-variant: SMALL-CAPS"><B>Title</B></FONT></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS"> Thomas W. Scott</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Thomas W. Scott
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Chairman of the Board&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">James R. Scott</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
James R. Scott
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Vice Chairman of the Board&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">Elouise C. Cobell</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Elouise C. Cobell
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">Steven J. Corning</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Steven J. Corning
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">David H. Crum</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
David H. Crum
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">Richard A. Dorn</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Richard A. Dorn
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">William B. Ebzery</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
William B. Ebzery
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">Charles E. Hart</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Charles E. Hart
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->4<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="25%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="32%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left"><FONT style="font-variant: SMALL-CAPS"><B>Signature</B></FONT></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left"><FONT style="font-variant: SMALL-CAPS"><B>Title</B></FONT></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR style="font-size:6pt"><TD>&nbsp;</TD></TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">James W. Haugh</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
James W. Haugh
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">Charles M. Heyneman</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Charles M. Heyneman
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">Lyle R. Knight</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Lyle R. Knight
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top" nowrap>President and Chief Executive Officer, Director&nbsp;<BR>(Principal
Executive Officer)</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Terry W. Payne
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;Director</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">Jonathan R. Scott</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Jonathan R. Scott
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">Julie A. Scott</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Julie A. Scott
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">Randall I. Scott</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Randall I. Scott
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">Michael J. Scott</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Michael J. Sullivan
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">Sandra A. Scott Suzor</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Sandra A. Scott Suzor
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">Martin A. White</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Martin A. White
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ <FONT style="font-variant: SMALL-CAPS">Terrill R. Moore</FONT>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Terrill R. Moore
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top" nowrap>Executive Vice President, Chief Financial Officer&nbsp;<BR>
(Principal Financial and Accounting Officer)</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt">2. <U>SAVINGS AND PROFIT SHARING PLAN FOR EMPLOYEES OF FIRST INTERSTATE BANSYSTEM, INC. </U>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act, the trustee has duly caused this caused
this Registration Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Billings, State of Montana, on August&nbsp;18, 2008.
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="45%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="40%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Savings and Profit Sharing Plan for Employees of
First Interstate BancSystem, Inc.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ <FONT style="font-variant: SMALL-CAPS">Lyle R. Knight</FONT></TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">By: Lyle R. Knight</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Its: Chairman, First Interstate BancSystem, Inc. <BR>

Benefits Committee, Plan Administrator of the Savings
and Profit Sharing Plan for Employees of First
Interstate BancSystem, Inc.</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->5<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>FIRST INTERSTATE BANCSYSTEM, INC.</B>
</DIV>

<!-- link1 "EXHIBIT INDEX" -->

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>EXHIBITS INDEX</B>

</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="88%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" colspan="3">Regulation S-K</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" colspan="3" style="border-bottom: 1px solid #000000">Exhibit</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Document</TD>
</TR>
<TR style="font-size:6pt"><TD>&nbsp;</TD></TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="left" valign="top" colspan="2">4.1(1)</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Form of Shareholder&#146;s Agreement for non-Scott family members dated August&nbsp;19,
2002.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.30</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">First Interstate BancSystem, Inc. Employee Stock Purchase Plan, as amended and
restated effective April&nbsp;30, 2008.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.31</TD>
    <TD nowrap valign="top">(2)</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Savings and Profit Sharing Plan for Employees of First Interstate BancSystem,
Inc., 2006 Restatement.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.32</TD>
    <TD nowrap valign="top">(3)</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">First Amendment to the Savings and Profit Sharing Plan for Employees of First
Interstate BancSystem, Inc., 2006 Restatement.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.33</TD>
    <TD nowrap valign="top">(3)</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Second Amendment to the Savings and Profit Sharing Plan for Employees of First
Interstate BancSystem, Inc., 2006 Restatement.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">4.34</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Third Amendment to the Savings and Profit Sharing Plan for Employees of First
Interstate BancSystem, Inc., 2006 Restatement.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="left" valign="top">5</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Opinion of Holland&nbsp;&#038; Hart LLP, as to the legality of securities being registered.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">23.1</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Consent of McGladrey &#038; Pullen LLP.</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">23.2</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Consent of Holland &#038; Hart LLP (contained in Exhibit&nbsp;5).</DIV></TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
</TR>
<TR valign="bottom">
    <TD nowrap align="right" valign="top">&nbsp;</TD>
    <TD align="left" valign="top">24</TD>
    <TD nowrap valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Power of Attorney (included on page&nbsp;4 of this Registration Statement).</DIV></TD>
</TR>
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<DIV align="center" style="font-size: 10pt; margin-top: 18pt">* * * * * * * * * * * * * * * * * * * *
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<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 1px solid #000000">&nbsp;</DIV>
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    <TD width="1%"></TD>
    <TD width="96"></TD>
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<TR valign="top">
    <TD nowrap align="left">(1)</TD>
    <TD>&nbsp;</TD>
    <TD>Incorporated by reference to the Registrant&#146;s Post-Effective Amendment No.&nbsp;2 to
Registration Statement on Form&nbsp;S-8, No.&nbsp;333-76825.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(2)</TD>
    <TD>&nbsp;</TD>
    <TD>Incorporated by reference to the Registrant&#146;s Post-Effective Amendment No.&nbsp;6 to
Registration Statement on Form&nbsp;S-8, No.&nbsp;333-76825.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(3)</TD>
    <TD>&nbsp;</TD>
    <TD>Incorporated by reference to the Registrant&#146;s Post-Effective Amendment No.&nbsp;5 to
Registration Statement on Form&nbsp;S-8, No.&nbsp;333-53011.</TD>
</TR>

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sv8
As filed with the Securities and Exchange Commission on August 18, 2008
Registration No. 333-
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
FORM S-8
REGISTRATION STATEMENT UNDER
THE SECURITIES ACT OF 1933
FIRST INTERSTATE BANCSYSTEM, INC.
(Exact name of issuer as specified in its charter)
Montana
81-0331430
(State or other Jurisdiction of
incorporation or organization)
(I.R.S. Employer Identification Number)
400 North 31
st
Street, Billings, Montana 59116
(Address of Principal Executive Offices and Zip Code)
FIRST INTERSTATE BANCSYSTEM, INC. EMPLOYEE STOCK PURCHASE PLAN, AS AMENDED AND RESTATED
SAVINGS AND PROFIT SHARING PLAN FOR EMPLOYEES OF FIRST INTERSTATE BANCSYSTEM, INC., 2006
RESTATEMENT, AS AMENDED
(Full titles of plans)
Terrill R. Moore
Executive Vice President and Chief Financial Officer
FIRST INTERSTATE BANCSYSTEM, INC.
401 North 31st Street
Billings, Montana 59116
(Name and address of agent for service)
(406) 255-5390
(Telephone number, including area code, of agent for service)
With a Copy to:
Holland & Hart LLP
Attn: David G. Angerbauer, Esq.
60 East South Temple, Suite 2000
Salt Lake City, Utah 84111
(801) 799-5800
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer,
a non-accelerated filer, or a smaller reporting company.
See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act. (Check one):
Large accelerated filer
o
Accelerated filer
o
Non-accelerated filer
þ
(Do not check if a smaller reporting company)
Smaller Reporting Company
o
CALCULATION OF REGISTRATION FEE
Proposed
Proposed
Amount to be
maximum offering
maximum aggregate
Amount of
Title of securities to be registered (1)
registered (2)
price per share (3)
offering price
registration fee
Common Stock (no par value)
2,000,000
$
77.00
$
154,000,000
$
6,052.20
(1)
Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the "Securities Act"),
this Registration Statement shall also cover any additional shares of the Registrant's Common
Stock, no par value, which are issued or become issuable under the First Interstate
BancSystem, Inc. Employee Stock Purchase Plan, as amended and restated, and the Savings and
Profit Sharing Plan for Employees of First Interstate BancSystem, Inc., 2006 Restatement, as
amended, to prevent dilution resulting from any stock split, stock dividend or similar
transactions.
(2)
In addition, pursuant to Rule 416(c) under the Securities Act, this Registration Statement
also covers an indeterminate amount of interests to be offered or sold pursuant to the Savings
and Profit Sharing Plan for Employees of First Interstate BancSystem, Inc., 2006 Restatement,
as amended.
(3)
Calculated in accordance with Rule 457(h) under the Securities Act, based upon the latest
appraised value of $77.00 per share as of June 30, 2008, as established on August 13, 2008.
EXPLANATORY NOTE
This Registration Statement on Form S-8 is being filed pursuant to General Instruction E for
Form S-8 under the Securities Act of 1933, as amended (the "Securities Act"), to register 2,000,000
additional shares of the registrant's common stock available for issuance pursuant to the First
Interstate BancSystem, Inc. Employee Stock Purchase Plan, as amended and restated, and the Savings
and Profit Sharing Plan for Employees of First Interstate BancSystem, Inc., 2006 Restatement, as
amended. This Registration Statement incorporates by reference the contents of the Registrant's
Registration Statements on Form S-8 related to the plans previously filed on (i) May 19, 1998 (Reg.
No. 333-53011), and (ii) April 22, 1999 (Reg. No. 333-76825), including all exhibits and amendments
thereto and all periodic reports of the Registrant that were filed subsequent to the prior Form
S-8s and which are incorporated by reference into such Form S-8s.
PART II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
Item 8.      EXHIBITS
Regulation S-K
Exhibit
Document
4.1(1)
Form of Shareholder's Agreement for non-Scott family members dated August 19,
2002.
4.30
First Interstate BancSystem, Inc. Employee Stock Purchase Plan, as amended and
restated effective April 30, 2008.
4.31
(2)
Savings and Profit Sharing Plan for Employees of First Interstate BancSystem,
Inc., 2006 Restatement.
4.32
(3)
First Amendment to the Savings and Profit Sharing Plan for Employees of First
Interstate BancSystem, Inc., 2006 Restatement.
4.33
(3)
Second Amendment to the Savings and Profit Sharing Plan for Employees of First
Interstate BancSystem, Inc., 2006 Restatement.
4.34
Third Amendment to the Savings and Profit Sharing Plan for Employees of First
Interstate BancSystem, Inc., 2006 Restatement.
5
Opinion of Holland & Hart LLP, as to the legality of securities being registered.
23.1
Consent of McGladrey & Pullen LLP.
23.2
Consent of Holland & Hart LLP (contained in Exhibit 5).
24
Power of Attorney (included on page 4 of this Registration Statement).
* * * * * * * * * * * * * * * * * * * *
(1)
Incorporated by reference to the Registrant's Post-Effective Amendment No. 2 to
Registration Statement on Form S-8, No. 333-76825.
(2)
Incorporated by reference to the Registrant's Post-Effective Amendment No. 6 to
Registration Statement on Form S-8, No. 333-76825.
(3)
Incorporated by reference to the Registrant's Post-Effective Amendment No. 5 to
Registration Statement on Form S-8, No. 333-53011.
3
SIGNATURES
1. REGISTRANT
Pursuant to the requirements of the Securities Act, the Registrant certifies that it has
reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has
duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Billings, State of Montana, on August 18, 2008.
First Interstate BancSystem, Inc.
By:
/s/
Lyle R. Knight
Lyle R. Knight
President and Chief Executive Officer
POWER OF ATTORNEY
KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature to this Registration
Statement appears below hereby constitutes and appoints Lyle R. Knight and Terrill R. Moore, and
each of them, as his true and lawful attorney-in-fact and agent, with full power of substitution,
to sign on his behalf individually and in the capacity stated below, and to perform any acts
necessary to be done in order to file all amendments and post-effective amendments to this
Registration Statement, and any and all instruments or documents filed as part of or in connection
with this Registration Statement or the amendments thereto and each of the undersigned does hereby
ratify and confirm all that such attorney-in-fact and agent, or his substitutes, shall do or cause
to be done by virtue hereof.
Pursuant to the requirements of the Securities Act of 1933, the Registration Statement has
been signed below by the following persons in the capacities indicated on August 18, 2008.
Signature
Title
/s/
Thomas W. Scott
Thomas W. Scott
Chairman of the Board
/s/
James R. Scott
James R. Scott
Vice Chairman of the Board
/s/
Elouise C. Cobell
Elouise C. Cobell
Director
/s/
Steven J. Corning
Steven J. Corning
Director
/s/
David H. Crum
David H. Crum
Director
/s/
Richard A. Dorn
Richard A. Dorn
Director
/s/
William B. Ebzery
William B. Ebzery
Director
/s/
Charles E. Hart
Charles E. Hart
Director
4
Signature
Title
/s/
James W. Haugh
James W. Haugh
Director
/s/
Charles M. Heyneman
Charles M. Heyneman
Director
/s/
Lyle R. Knight
Lyle R. Knight
President and Chief Executive Officer, Director
(Principal
Executive Officer)
Terry W. Payne
Director
/s/
Jonathan R. Scott
Jonathan R. Scott
Director
/s/
Julie A. Scott
Julie A. Scott
Director
/s/
Randall I. Scott
Randall I. Scott
Director
/s/
Michael J. Scott
Michael J. Sullivan
Director
/s/
Sandra A. Scott Suzor
Sandra A. Scott Suzor
Director
/s/
Martin A. White
Martin A. White
Director
/s/
Terrill R. Moore
Terrill R. Moore
Executive Vice President, Chief Financial Officer
(Principal Financial and Accounting Officer)
2.
SAVINGS AND PROFIT SHARING PLAN FOR EMPLOYEES OF FIRST INTERSTATE BANSYSTEM, INC.
Pursuant to the requirements of the Securities Act, the trustee has duly caused this caused
this Registration Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Billings, State of Montana, on August 18, 2008.
Savings and Profit Sharing Plan for Employees of
First Interstate BancSystem, Inc.
/s/
Lyle R. Knight
By: Lyle R. Knight
Its: Chairman, First Interstate BancSystem, Inc.
Benefits Committee, Plan Administrator of the Savings
and Profit Sharing Plan for Employees of First
Interstate BancSystem, Inc.
5
FIRST INTERSTATE BANCSYSTEM, INC.
EXHIBITS INDEX
Regulation S-K
Exhibit
Document
4.1(1)
Form of Shareholder's Agreement for non-Scott family members dated August 19,
2002.
4.30
First Interstate BancSystem, Inc. Employee Stock Purchase Plan, as amended and
restated effective April 30, 2008.
4.31
(2)
Savings and Profit Sharing Plan for Employees of First Interstate BancSystem,
Inc., 2006 Restatement.
4.32
(3)
First Amendment to the Savings and Profit Sharing Plan for Employees of First
Interstate BancSystem, Inc., 2006 Restatement.
4.33
(3)
Second Amendment to the Savings and Profit Sharing Plan for Employees of First
Interstate BancSystem, Inc., 2006 Restatement.
4.34
Third Amendment to the Savings and Profit Sharing Plan for Employees of First
Interstate BancSystem, Inc., 2006 Restatement.
5
Opinion of Holland & Hart LLP, as to the legality of securities being registered.
23.1
Consent of McGladrey & Pullen LLP.
23.2
Consent of Holland & Hart LLP (contained in Exhibit 5).
24
Power of Attorney (included on page 4 of this Registration Statement).
* * * * * * * * * * * * * * * * * * * *
(1)
Incorporated by reference to the Registrant's Post-Effective Amendment No. 2 to
Registration Statement on Form S-8, No. 333-76825.
(2)
Incorporated by reference to the Registrant's Post-Effective Amendment No. 6 to
Registration Statement on Form S-8, No. 333-76825.
(3)
Incorporated by reference to the Registrant's Post-Effective Amendment No. 5 to
Registration Statement on Form S-8, No. 333-53011.
6