Chris Diamantopoulos

as Robin Williams

Erinn Hayes

as Pam Dawber

Michelle Harrison

as Valerie Velardi

Tyler Labine

as John Belushi

David James Lewis

as Ira Denmark

David Richmond-Peck

as Harvey Severson

Meredith McGeachie

as Lila Milford

Richard Kahan

as Alan Davis

Daniel Roebuck

as Garry Marshall

Ona Grauer

as Raquel Welch

Stacy Fair

as Penny Marshall