<PAGE>

===============================================================================

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                ----------------

                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

                     Date of Report (Date of earliest Event
                          Reported): September 29, 2006

                        Alternative Loan Trust 2006-33CB
                        --------------------------------
                       (Exact name of the issuing entity)
           Commission File Number of the issuing entity: 333-131630-58

                                   CWALT, Inc.
                                   -----------
            (Exact name of the depositor as specified in its charter)
               Commission File Number of the depositor: 333-131630

                           Countrywide Home Loans Inc.
                           ---------------------------
             (Exact name of the sponsor as specified in its charter)


               Delaware                                87-0698307
               --------                                ----------
     (State or Other Jurisdiction                   (I.R.S. Employer
  of Incorporation of the depositor)      Identification No. of the depositor)

4500 Park Granada
Calabasas, California                                       91302
---------------------                                     ---------
(Address of Principal                                     (Zip Code)
 Executive Offices of the depositor)

The depositor's telephone number, including area code (818) 225-3000
                                                      --------------

===============================================================================

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any
following provisions:

[ ]      Written communications pursuant to Rule 425 under the Securities Act
         (17 CFR 230.425)

[ ]      Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act
         (17 CFR 240.14a- 12(b))

[ ]      Pre-commencement communications pursuant to Rule 14d-2(b) under the
         Exchange Act (17 CFR 240.14d-2(b))

[ ]      Pre-commencement communications pursuant to Rule 13e-4(c) under the
         Exchange Act (17 CFR 240.13e-4(c))


<PAGE>


Section 7         Regulation FD

Item 7.01 Regulation FD Disclosure.

         On September 29, 2006, CWALT, Inc. (the "Depositor") created the
Alternative Loan Trust 2006-33CB (the "Issuing Entity") pursuant to a Pooling
and Servicing Agreement, dated as of September 1, 2006 (the "Pooling and
Servicing Agreement"), among the Depositor, Countrywide Home Loans, Inc., as a
seller, Park Grananda LLC, as a seller, Park Monaco Inc., as a seller, Park
Sienna LLC, as a seller, Countrywide Home Loans Servicing LP, as master
servicer, and The Bank of New York, as trustee. Capitalized terms used but not
defined herein shall have the respective meanings assigned to them in the
Pooling and Servicing Agreement.

         On September 29, 2006, the Depositor transferred the Closing Date
Mortgage Loans to the Issuing Entity. The loan level data tape attached hereto
as Exhibit 99.1 describes characteristics of each Closing Date Mortgage Loan as
of its Cut-off Date.

Item 9.01. Financial Statements and Exhibits.

(a) Not applicable.

(b) Not applicable.

(c) Exhibits:

         Exhibit No.       Description
         -----------       -----------
           99.1            Characteristics of the Closing Date Mortgage Loans







<PAGE>


                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                              CWALT, INC.




                                              By: /s/ Darren Bigby
                                                  -----------------------------
                                              Name: Darren Bigby
                                              Title: Vice President


Dated: October 10, 2006


<PAGE>


                                  Exhibit Index
                                  -------------


Exhibit No.  Description
-----------  -----------
99.1         Characteristics of the Closing Date Mortgage Loans
[{"type": "8-K", "sequence": "1", "filename": "b415128_8k.txt", "description": "FORM 8K", "secsgml_size_bytes": 4755}]
{"company-data": {"conformed-name": "Alternative Loan Trust 2006-33CB", "cik": "0001375543", "assigned-sic": "6189", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "333-131630-58", "film-number": "061136044"}, "business-address": {"street1": "4500 PARK GRANADA", "city": "CALABASAS", "state": "CA", "zip": "91302", "phone": "818-332-5300"}, "mail-address": {"street1": "4500 PARK GRANADA", "city": "CALABASAS", "state": "CA", "zip": "91302"}}
===============================================================================

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                ----------------

                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

                     Date of Report (Date of earliest Event
                          Reported): September 29, 2006

                        Alternative Loan Trust 2006-33CB
                        --------------------------------
                       (Exact name of the issuing entity)
           Commission File Number of the issuing entity: 333-131630-58

                                   CWALT, Inc.
                                   -----------
            (Exact name of the depositor as specified in its charter)
               Commission File Number of the depositor: 333-131630

                           Countrywide Home Loans Inc.
                           ---------------------------
             (Exact name of the sponsor as specified in its charter)

               Delaware                                87-0698307
               --------                                ----------
     (State or Other Jurisdiction                   (I.R.S. Employer
  of Incorporation of the depositor)      Identification No. of the depositor)

4500 Park Granada
Calabasas, California                                       91302
---------------------                                     ---------
(Address of Principal                                     (Zip Code)
 Executive Offices of the depositor)

The depositor's telephone number, including area code (818) 225-3000
                                                      --------------

===============================================================================

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any
following provisions:

[ ]      Written communications pursuant to Rule 425 under the Securities Act
         (17 CFR 230.425)

[ ]      Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act
         (17 CFR 240.14a- 12(b))

[ ]      Pre-commencement communications pursuant to Rule 14d-2(b) under the
         Exchange Act (17 CFR 240.14d-2(b))

[ ]      Pre-commencement communications pursuant to Rule 13e-4(c) under the
         Exchange Act (17 CFR 240.13e-4(c))
Section 7         Regulation FD

Item 7.01 Regulation FD Disclosure.

         On September 29, 2006, CWALT, Inc. (the "Depositor") created the
Alternative Loan Trust 2006-33CB (the "Issuing Entity") pursuant to a Pooling
and Servicing Agreement, dated as of September 1, 2006 (the "Pooling and
Servicing Agreement"), among the Depositor, Countrywide Home Loans, Inc., as a
seller, Park Grananda LLC, as a seller, Park Monaco Inc., as a seller, Park
Sienna LLC, as a seller, Countrywide Home Loans Servicing LP, as master
servicer, and The Bank of New York, as trustee. Capitalized terms used but not
defined herein shall have the respective meanings assigned to them in the
Pooling and Servicing Agreement.

         On September 29, 2006, the Depositor transferred the Closing Date
Mortgage Loans to the Issuing Entity. The loan level data tape attached hereto
as Exhibit 99.1 describes characteristics of each Closing Date Mortgage Loan as
of its Cut-off Date.

Item 9.01. Financial Statements and Exhibits.

(a) Not applicable.

(b) Not applicable.

(c) Exhibits:

         Exhibit No.       Description
         -----------       -----------
           99.1            Characteristics of the Closing Date Mortgage Loans
SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                              CWALT, INC.

                                              By: /s/ Darren Bigby
                                                  -----------------------------
                                              Name: Darren Bigby
                                              Title: Vice President

Dated: October 10, 2006
Exhibit Index
                                  -------------

Exhibit No.  Description
-----------  -----------
99.1         Characteristics of the Closing Date Mortgage Loans