Exhibit 32

CERTIFICATION

     In connection with the Quarterly Report on Form 10-Q of American International Group, Inc. (the “Company”) for the quarter ended June 30, 2008, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Robert B. Willumstad, Chairman and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, that to my knowledge:

     1. The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

     2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Robert B. Willumstad

Robert B. Willumstad

Chairman and Chief Executive Officer

Date: August 6, 2008

     The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of the Report or as a separate disclosure document.

CERTIFICATION

     In connection with the Quarterly Report on Form 10-Q of American International Group, Inc. (the “Company”) for the quarter ended June 30, 2008, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Steven J. Bensinger, Vice Chairman — Financial Services and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, that to my knowledge:

     1. The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

     2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Steven J. Bensinger

Steven J. Bensinger

Vice Chairman — Financial Services and

Chief Financial Officer

Date: August 6, 2008

     The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of the Report or as a separate disclosure document.