Exhibit 32.3

Certification Pursuant to Section 1350 of Chapter 63 of Title 18 of the United States Code

     I, Steven J. Heyer, the Chief Executive Officer of Starwood Hotels & Resorts (“Starwood”), certify that (i) the Form 10-Q for the quarter ended June 30, 2005 (the “Form 10-Q”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of Starwood.

/s/ Steven J. Heyer

Steven J. Heyer

Chief Executive Officer

Starwood Hotels & Resorts

July 29, 2005