1 EXHIBIT 15.1 ACKNOWLEDGMENT LETTER To the Stockholders and Board of Directors Executive Risk Inc. We are aware of the incorporation by reference in the Registration Statement (Form S-8 No. 33-78414) pertaining to the Executive Risk Inc. Nonqualified Stock Option Plan, Executive Risk Inc. Employee Incentive Nonqualified Stock Option Plan, Executive Risk Inc. IPO Stock Compensation Plan, Executive Risk Inc. Nonemployee Directors Stock Option Plan, and Option Agreements for Outside Directors of Executive Re Inc. of our report dated May 7, 1998 relating to the unaudited consolidated interim financial statements of Executive Risk Inc. which are included in its Form 10-Q for the quarter ended March 31, 1998. /S/ ERNST & YOUNG LLP Stamford, Connecticut May 7, 1998 11