Exhibit 31.1

 THE WILLOWBRIDGE FUND L.P.CERTIFICATION

 Robert Lernercertify that:

| 1)
 I have reviewed thisquarterly report on for: Willowbridge Fund, L.P.

 
2)
Based on my knowledge, thisreport does not contain any untrue statement or a material fact or omit tostate a material part necessary to make the statements made, in light ofthe circumstances under which such statements were made, not misleadingwith respect to the period covered by this report;
 
3)
 Based on my knowledge,the financial statements, and other financial information included in thisreport, fairly present in all material respects the financial condition,results of operations and cash flows of the registrant as of, aid for, theperiods presented in this report;
 
4)
The registrant's other certifying officers and I are responsible forestablishing and maintaining disclosure controls and procedures (as definedin Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

 

 
a)
designed such disclosurecontrols and procedures, or caused such disclosure controls and proceduresto be designed under our supervision, to ensure that material informationrelating to the registrant is made known to us by others within thoseentities, particularly during the period in which this report is beingprepared;
  
b)
evaluated the effectiveness ofthe registrant's disclosure controls and procedures and presented in thisreport our conclusions about the effectiveness of the disclosure controlsand procedures, as of the end of the period covered by this report based onsuch evaluation; and
  
c)
disclosed in this report anychange in the registrant's internal control over financial reporting thatoccurred during the registrant's roost recent fiscal quarter that hasmaterially affected, or is reasonably likely to materially affect, theregistrant's internal control over financial reporting; and
 
5)
The registrant's othercertifying officers and I have disclosed, based on our most recentevaluation of internal control over financial reporting, to theregistrant's auditors and the audit committee of the registrant's board ofdirectors (or persons performing the equivalent functions):
  
a)
 all significantdeficiencies and material weaknesses in the design or operation of internalcontrol over financial reporting which are reasonably likely to adverselyaffect the registrant's ability to record, process, summarize and reportfinancial information; and
  
b)
 any fraud, whether or notmaterial, that involves management or other employees who have asignificant role in the registrant's internal control over financialreporting.
 
 
Date:  May 16,2005                                                By: ***/s/ Robert L Lerner                                         ***                                                                                       President of Ruvane Investment Corporation                                                                                       the general partner of The Willowbridge Fund L.P.
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