Eileen Brennan .... Mrs. Peacock
Tim Curry .... Wadsworth
Madeline Kahn .... Mrs. White
Christopher Lloyd .... Professor Plum
Michael McKean .... Mr. Green
Martin Mull .... Colonel Mustard
Lesley Ann Warren .... Miss Scarlet
Colleen Camp .... Yvette
Lee Ving .... Mr. Boddy
Bill Henderson .... The Cop
Jane Wiedlin .... The Singing Telegram Girl
Jeffrey Kramer .... The Motorist
Kellye Nakahara .... Mrs. Ho the Cook
Will Nye .... Cop #1
Rick Goldman .... Cop #2