Dan Aykroyd Judge Alvin "J.P" Valkenheiser, Bobo Director, Actor, Screenwriter Chevy Chase Chris Thorne Actor John Candy Dennis, Eldona Actor Demi Moore Diane Lightson Actor Valri Bromfield Miss Purdah Actor Taylor Negron Fausto Squiriniszu Actor Bertila Damas Renalda Squiriniszu Actor Raymond J. Barry Mark Actor Brian Doyle-Murray Brian Actor John Wesley Sam Actor Peter Aykroyd Mike the Doorman Actor, Writer Daniel Baldwin Dealer Actor Lester Berman Producer Robert K. Weiss Producer Malcolm Campbell Film Editing James R. Symons Film Editing Dean Cundy Cinematographer Michael Kamen Original Music William Sandell Production Design Michael Taylor Set Decoration Deborah Nadoolman Costume Design Marion Dougherty Casting Sharon Howard-Field Casting