Michael McGreevey as Arthur Loomis

Bill Mumy as Petey Loomis

Jack Carson as Harold Sylvester

Robert Culp as Chester 'Chet' Loomis

Ann Jillian as Porsche 'Rocky' Sylvester

Patricia Barry as Helen Loomis

Elisabeth Fraser as Lovey Sylvester

Renie Riano as Mrs. Crotty

Mary Mitchel as Sue Foster

Claude Stroud as Ben

Bill Baldwin as Party Guest (uncredited)

Benjie Bancroft as Party Guest (uncredited)

Tommy Farrell as Party Guest (uncredited)

Shep Houghton as Party Guest (uncredited)

Joseph La Cava as Waiter (uncredited)

Luree Wiese as Waitress (uncredited)