 | Cary Grant als Tom Winters |
 | Sophia Loren als Cinzia Zaccardi |
 | Martha Hyer als Carolyn Gibson |
 | Harry Guardino als Angelo Donatello |
 | Eduardo Ciannelli als Arturo Zaccardi |
 | Murray Hamilton als Capt. Alan Wilson |
 | Mimi Gibson als Elizabeth Winters |
 | Paul Petersen als David Winters |
 | Charles Herbert als Robert Winters |
 | Werner Klemperer als Harold Messner |
 | Madge Kennedy als Mrs. Farnsworth |
 | John Litel als Mr. William Farnsworth |
 | Bess Flowers als Wedding Guest |
 | Kathleen Freeman als Laundromat Gossip |
 | Marc Wilder als Specialty Dancer (uncredited) |
 | Ralph Brooks als Country Club Patron (uncredited) |
| Beulah Christian als Country Club Patron (uncredited) |
| Oliver Cross als Country Club Patron (uncredited) |
| Roy Damron als Country Club Patron (uncredited) |
| Kenneth Gibson als Country Club Patron (uncredited) |
| James Gonzalez als Country Club Patron (uncredited) |
 | Kenner G. Kemp als Country Club Patron (uncredited) |
| Perk Lazelle als Country Club Patron (uncredited) |
| William Meader als Country Club Patron (uncredited) |
 | Harold Miller als Country Club Patron / Wedding Guest (uncredited) |
| Hans Moebus als Country Club Patron (uncredited) |
| Tom Ferrandini als Country Club Patron (uncredited) |
| Bess Flowers als Country Club Patron (uncredited) |
| Norman Stevans als Country Club Patron (uncredited) |
| Murray Pollack als Country Club Patron (uncredited) |
 | Jeffrey Sayre als Country Club Patron (uncredited) |
| Jose Portugal als Country Club Patron (uncredited) |
| Ruby Scrivo als Dancer (uncredited) |
| Lennie Smith als Dancer (uncredited) |
 | Scott Brady als Dancer (non crédité) |
| Nikki Faustino Brady als Dancer (non crédité) |
| Tony Rosa als Dancer (uncredited) |
 | Joe Lanza als Dancer (uncredited) |
 | Jack Chefe als Country Club Waiter (uncredited) |
| Joe Evans als Waiter (uncredited) |
| Paul Ravel als Carnival Patron (uncredited) |
| Herman Belmonte als Carnival Patron (uncredited) |
| Wally Walker als Pitchman (uncredited) |
 | Brooks Benedict als Pitchman (uncredited) |
| Joe McTurk als Pitchman (uncredited) |
 | Helen Brown als Woman in Laundromat (uncredited) |
| Peggy Connelly als Eleanor Wilson (uncredited) |
| Stewart East als Police Officer (uncredited) |
| Kathleen Freeman als Laundromat Gossip (uncredited) |
 | Bill Hickman als Handsome Man (uncredited) |
| Florence MacAfee als Laundromat Attendant (uncredited) |
 | Philo McCullough als Carnival Patron (uncredited) |
| Mabel Smaney als Carnival Patron (uncredited) |
| Pat Moran als Mabel Smaney |
| Pat Moran als A Party Guest (uncredited) |
 | Bert Stevens als A Party Guest (uncredited) |
| Bobby Gilbert als A Party Guest (uncredited) |
| Jack Deery als A Party Guest (uncredited) |
| Ernst Brengt als French Diplomat (uncredited) |
 | Julian Rivero als Spanish Diplomat (uncredited) |
 | Mary Forbes als British Society Woman (uncredited) |
| William Remick als Justice of the Peace (uncredited) |
| Edwin Rochelle als Caterer (uncredited) |
 | Barbara Steele als Minor Role (uncredited) |
| Larry Carr als Minor Role (uncredited) |
| Grace Gregory | Set Decoration |
| Betsy Drake | Screenplay |
| Melville Shavelson | Director |
| Melville Shavelson | Writer |
| Jack Rose | Producer |
| John B. Goodman | Art Direction |
| Jack Rose | Writer |
| Frank Bracht | Editor |
| Edith Head | Costume Design |
| Ray June | Director of Photography |
| Sam Comer | Set Decoration |
| George Duning | Original Music Composer |
| Bud Bashaw Jr. | Makeup Artist |
| Hal C. Kern | Associate Producer |
| Yul Brynner | Still Photographer |
| Dorothy Yutzi | Script Supervisor |
| Van Cleave | Orchestrator |
| Arthur Morton | Orchestrator |
| George Duning | Music Director |
| Richard Mueller | Color Grading |
| Bud Clark | Wardrobe Designer |
| Leonard J. South | Camera Operator |
| Jack Harris | Still Photographer |
| John P. Fulton | Special Effects |
| Farciot Edouart | Photo Retouching |
| Farciot Edouart | Sound Editor |
| Hugo Grenzbach | Sound Recordist |
| Bill Wistrom | Sound Editor |
| Gene Lauritzen | Construction Coordinator |
| James A. Rosenberger | Assistant Director |
| Michael D. Moore | Assistant Director |
| Charles Woolstenhulme | Unit Manager |
| Andrew J. Durkus | Unit Production Manager |
| Karl Silvera | Makeup Artist |
| Dean Cole | Hair Setup |
| Nellie Manley | Hair Supervisor |
| Sam Comer | Decorator |
| Grace Gregory | Decorator |
| Hal Pereira | Art Direction |
