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): May 31, 2007

Alternative Loan Trust 2007-15CB

(Exact name of the issuing entity)

Commission File Number of the issuing entity: 333-140962-08

CWALT, Inc.

(Exact name of the depositor as specified in its charter)

Commission File Number of the depositor: 333-140962

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		91302
Calabasas, California		(Zip Code)
(Address of Principal
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 CFR240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act(17 CFR240.13e-4(c))

Section 9 Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits.

(a)

Financial statements of business acquired.

Not applicable.

(b)

Pro forma financial information.

Not applicable.

(c)

Exhibits.

5.1

Legality Opinion of Sidley Austin LLP.

8.1

Tax Opinion of Sidley Austin LLP (included in Exhibit 5.1).

23.1

Tax Opinion of Sidley Austin LLP (included in Exhibit 5.1).

SIGNATURES

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

	CWALT, INC

	By:	/s/ Darren Bigby
		Darren Bigby
		Executive Vice President


Dated: June 5, 2007

Exhibit Index

Exhibit		Page

5.1	Legality Opinion of Sidley Austin LLP	1

8.1	Tax Opinion of Sidley Austin LLP (included in Exhibit 5.1)	1

23.1	Consent of Sidley Austin LLP (included in Exhibits 5.1 and 8.1)	1

Alternative Loan Trust 2007-15CB 8-K