Exhibit 31.1

THE  WILLOWBRIDGE FUND L.P.  CERTIFICATION

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I, Robert Lerner, certify that:
 
 
1)
I have reviewed this quarterly report for: The Willowbridge Fund, L.P.
 
 
2)
Based on my knowledge, this report does not contain      any untrue statement or a material fact or omit to state a material part      necessary to make the statements made, in light of the circumstances under      which such statements were made, not misleading with respect to the period      covered by this report;
 
 
3)
Based on my knowledge, the financial statements, and      other financial information included in this report, fairly present in all      material respects the financial condition, results of operations and cash      flows of the registrant as of, aid for, the periods presented in this      report;
 
 
4)
The registrant's other certifying officers and I are      responsible for establishing and maintaining disclosure controls and      procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for      the registrant and have:
 
 
 
a)
designed such disclosure controls and procedures, or      caused such disclosure controls and procedures to be designed under our      supervision, to ensure that material information relating to the      registrant is made known to us by others within those entities,      particularly during the period in which this report is being prepared;
 
 
 
b)
evaluated the effectiveness of the registrant's      disclosure controls and procedures and presented in this report our      conclusions about the effectiveness of the disclosure controls and      procedures, as of the end of the period covered by this report based on      such evaluation; and
 
 
 
c)
disclosed in this report any change in the      registrant's internal control over financial reporting that occurred      during the registrant's roost recent fiscal quarter that has materially      affected, or is reasonably likely to materially affect, the registrant's      internal control over financial reporting; and
 
 
5)
The registrant's other certifying officers and I have      disclosed, based on our most recent evaluation of internal control over      financial reporting, to the registrant's auditors and the audit committee      of the registrant's board of directors (or persons performing the      equivalent functions):
 
 
 
a)
all significant deficiencies and material weaknesses      in the design or operation of internal control over financial reporting      which are reasonably likely to adversely affect the registrant's ability      to record, process, summarize and report financial information; and
 
        
b)
 
any fraud, whether or not material, that involves      management or other employees who have a significant role in the      registrant's internal control over financial reporting.   Date:  September  13, 2006 By:  /s/ Robert L Lerner                                                     President      of Ruvane Fund Management Corporation  the      general partner of The Willowbridge Fund L.P.
 

            

                                                             

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