 | James Stewart als Shep Henderson |
 | Kim Novak als Gillian Holroyd |
 | Jack Lemmon als Nicky Holroyd |
 | Ernie Kovacs als Sidney Redlitch |
 | Hermione Gingold als Bianca de Passe |
 | Elsa Lanchester als Aunt Queenie Holroyd |
 | Janice Rule als Merle Kittridge |
 | Philippe Clay als French Singer at the Zodiac Club |
 | Bek Nelson als Tina |
 | Howard McNear als Andy White |
 | Fred Aldrich als Mover (uncredited) |
 | Leon Alton als Club Patron (uncredited) |
| Monty Ash als Herb Store Owner (uncredited) |
| Alex Ball als Club Patron (uncredited) |
| Joe Barry als Exterminator (uncredited) |
 | Wolfe Barzell als Zodiac Club Proprietor (uncredited) |
 | Gail Bonney als Betty - Merle's Maid (uncredited) |
 | Don Brodie als Cab Driver (uncredited) |
| Robert Haines als Club Patron (uncredited) |
| James Lanphier als Waldo (uncredited) |
| Perk Lazelle als Club Patron (uncredited) |
| Ted Mapes als Gillian's Customer (uncredited) |
| Hans Moebus als Club Patron (uncredited) |
| Ollie O'Toole als Elevator Operator (uncredited) |
| John Truax als Cab Driver (uncredited) |
| James Wong Howe | Director of Photography |
| George Duning | Original Music Composer |
| Richard Quine | Director |
| Jean Louis | Costume Design |
| Julian Blaustein | Producer |
| Charles Nelson | Editor |
| John Van Druten | Theatre Play |
| Cary Odell | Art Direction |
| Daniel Taradash | Screenplay |
| Louis Diage | Set Decoration |
| Helen Hunt | Hairstylist |
| Ben Lane | Makeup Artist |
| Rhoda Donaldson | Hairstylist |
| Irving J. Moore | Assistant Director |
| Max Stein | Assistant Director |
| Franklin Hansen | Sound |
| John P. Livadary | Recording Supervision |
| Win Hancock | Sound Recordist |
| Albert Bettcher | Assistant Camera |
| John Field | Gaffer |
| Richard H. Kline | Camera Operator |
| Val O'Malley | Camera Operator |
