Exhibit 32.1

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

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT CF 2002

The following statement is provided by the undersigned to accompany the Form 10-Q for RFMC Willowbridge Fund L.P. pursuant to 18 U.S.C. Section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002

The undersigned certifies in his capacity as an officer of Ruvane Fund Management Corporation, the general partner of RFMC Willowbridge Fund L.P., that the foregoing Report on Form 10-Q fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934 (15 U.S.C. 78m) and that the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of RFMC Willowbridge Fund L.P. for the period in question.

Date:  May 16, 2008 By:    /s/   Robert L. Lerner                                                       President, Principal Executive Officer and
Principal Financial Officer Ruvane Fund Management Corporation
the general partner of RFMC Willowbridge Fund L.P.