Roddy McDowall
— Alan Musgrave
Tuesday Weld
— Barbara Ann Greene
Lola Albright
— Marie Greene
Martin West
— Bob Bernard
Ruth Gordon
— Stella Bernard
Harvey Korman
— Weldon Emmett
Sarah Marshall
— Miss Schwartz
Lynn Carey
— Sally Grace
Donald Murphy
— Phil Neuhauser
Max Showalter
— Howard Greene
Joseph Mell
— Dr. Milton Lippman (as Joe Mell)
Dan Frazer
— Honest Joe
Martine Bartlett
— Inez
Jo Collins
— Kitten
Judith Loomis
— Butch Neuhauser
David Draper
— Billy Gibbons
Peter Adams
— Frank (uncredited)
Martin Gabel
— T. Harrison "Harry" Belmont (uncredited)