Albert Brooks as Robert Cole

Kathryn Harrold as Mary Harvard

Bruno Kirby as Jay

James L. Brooks as David

Bob Einstein as Sporting Goods Salesman

Jane Hallaren as Ellen

Albert Henderson as Head Mixer

Meadowlark Lemon as Himself

George Kennedy as George Kennedy / Zeron

Tyann Means as Waitress

Karen Chandler as Neighbor

Dennis Kort as Health Food Salesman

Virginia Feingold as Bank Receptionist

Thelma Leeds as Mother

Candy Castillo as Drugstore Manager

Rick Beckner as Zeon

Jerry Belson as Jerry

Harvey Miller as Harvey (as Harvey Skolnik)

Ed. Weinberger as Ed

Clifford Einstein as Music Mixer

Gene Garvin as Sound Effects Mixer

Hugh Warden as Bank Dick

Kelly Ann Nakano as Hostess

Joe Bratcher as Jim

George Sasaki as Japanese Businessman

Victor Toyota as Japanese Businessman

Roger Ito as Japanese Businessman

Paul Bryar as Man in Phone Booth (uncredited)

Mike Road as Spaceman (uncredited)