Exhibit 31.1

THE WILLOWBRIDGE FUND, L.P.

Rule 13a-14(a)/13d-14(a) Certifications

I, Robert L. Lerner, certify that:

| 1)             | I have reviewed this report on Form 10-K of The Willowbridge Fund, L.P.                                                                                                                                                                                                                                                        |
|----------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                                                                       |                                                                                                                                                                                                                                                                                                                           |   |
| 2)             | Based on my knowledge, this report does not contain any untrue statement      of a material fact or omit to state a material fact 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, and for, the periods presented in this report;                         |
|                                                                       |                                                                                                                                                                                                                                                                                                                           |   |
| 4)             | I am responsible for establishing and maintaining disclosure controls and      procedures (as defined in Exchange Act Rules 13a-14 and 15d-14) and      internal control over financial reporting (as defined in Exchange Act      Rules 13a-15(f) and 15d015(f)) for the registrant and I have:                               |
|                                                                       |                                                                                                                                                                                                                                                                                                                           |   |
|                                                                       | a)                                                                                                                                                                                                                                                                 | designed such disclosure controls and procedures, or caused such      disclosure controls and procedures to be designed under my supervision, to      ensure that material information relating to the registrant, including its      consolidated subsidiaries, is made known to me by others within those      entities, particularly during the period in which this report is being      prepared; |
|                                                                       |                                                                                                                                                                                                                                                                                                                           |   |
|                                                                       | b)                                                                                                                                                                                                                                                                           |  designed      such internal control over financial reporting, or caused such internal      control over financial reporting to be designed under my supervision, to      provide reasonable assurance regarding the reliability of financial      reporting and the preparation of financial statements for external      purposes in accordance with generally accepted accounting principles; |
|                                                                       |                                                                                                                                                                                                                                                                                                                           |   |
|                                                                       | c)                                                                                                                                                                                                                                                                 | evaluated the effectiveness of the registrant's disclosure controls and      procedures and presented in this report my 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 |
|                                                                       |                                                                                                                                                                                                                                                                                                                           |   |
|                                                                       | d)                                                                                                                                                                                                                                                                      | disclosed in this report any change in the registrant's internal control      over financial reporting that occurred during the registrant's fourth      fiscal quarter that has materially affected, or is reasonably likely to      materially affect, the registrant's internal control over financial      reporting; and |
|                                                                       |                                                                                                                                                                                                                                                                                                                           |   |
| 5)             | I have disclosed, based on my most recent evaluation, to the registrant's      auditors and the audit committee of registrant's board of directors (or      persons performing the equivalent function);                                                                                                                       |
|                                                                       |                                                                                                                                                                                                                                                                                                                           |   |
|                               | a)                                                                                                                                                                                                                                                                                                                   | all significant deficiencies 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. |
|                                                                       |                                                                                                                                                                                                                                                                                                                           |   |

By: /s/ Robert L.  Lerner                            Robert L. Lerner, President of  Ruvane Fund Management Corporation

  Date:  March 29, 2006