"Prototype dumb blonde Irma and her slacker, wheeler-dealer boyfriend Al interfere in the love life of Irma's level-headed room mate Jane."
Marie Wilson
as Irma Peterson
Diana Lynn
as Jane Stacy
Dean Martin
as Steve Laird
Jerry Lewis
as Seymour
John Lund
as Al
Don DeFore
as Richard Rhinelander
Hans Conried
as Prof. Kropotkin
Kathryn Givney
as Mrs. Rhinelander
Percy Helton
as Mr. Clyde
Gloria Gordon
as Mrs. O'Reilly
Ernö Verebes
as Mr. Ubang
Margaret Field
as Alice
Chester Conklin
as Gypsy Tea Room Waiter (uncredited)
Nick Cravat
as Mushie (uncredited)
Franklyn Farnum
as Maitre D' (uncredited)
Bess Flowers
as Gypsy Tea Room Diner (uncredited)
Hazel Boyne
Charles Coleman
as Henry
Jimmie Dundee
as Wallpaper Man (uncredited)
Sam Harris
William Meader
as Customer (uncredited)
Walter Merill
as Newspaper Man (uncredited)
Howard M. Mitchell
as Man in Parking Lot (uncredited)
Jack Mulhall
as Radio Context Announcer (uncredited)
Francis Pierlot
as Taxman (uncredited)
Joey Ray
as Sam the Pet Shop Man (uncredited)
Dewey Robinson
as Truck Driver (uncredited)
Billy Snyder
as Butcher (uncredited)
Douglas Spencer
as Interior Decorator (uncredited)
Ray Stanley
as Minor Role (uncredited)
Ian Wolfe
as Minister (uncredited)
Chief Yowlachie
as Indian (uncredited)
Leonard B. Ingoldest
as Orchestra Leader (uncredited)
Ken Niles
as Radio Contest Announcer (uncredited)
Harold Miller
George Marshall
Director
Leo Tover
Director of Photography
Parke Levy
Screenplay
Edith Head
Costume Design
Roy Webb
Original Music Composer
Cy Howard
Associate Producer
Henry Bumstead
Art Direction
Hal B. Wallis
Producer
Hans Dreier
Grace Gregory
Set Decoration
LeRoy Stone
Editor
Sam Comer
Charles Sickler
Grip
Gordon Jennings
Special Effects
Walter Oberst
Sound Recordist
Gene Merritt
Wally Westmore
Makeup Supervisor