WW International (WW) 10-Q 2007 Q1 Quarterly report

EXHIBIT 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350

In connection with the quarterly report of Weight Watchers International, Inc. (the “Company”) on Form 10-Q for the quarterly period ended March 31, 2007 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, David P. Kirchhoff, certify, pursuant to 18 U.S.C. Section 1350, that:

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

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

Date: May 10, 2007	By:	/s/ DAVID P. KIRCHHOFF
		David P. Kirchhoff
		President, Chief Executive Officer and Director
		(Principal Executive Officer)