 | Rex Harrison als Jimmy Broadbent |
 | Kay Kendall als Sheila Broadbent |
 | John Saxon als David Parkson |
 | Sandra Dee als Jane Broadbent |
 | Angela Lansbury als Mabel Claremont |
 | Peter Myers als David Fenner |
 | Diane Clare als Clarissa Claremont |
 | Sheila Raynor als Broadbents' Maid (uncredited) |
 | Ambrosine Phillpotts als Miss Grey (uncredited) |
 | Henri Guégan als Man at the Airport (uncredited) |
| René Aranda als Quaglino Diner (uncredited) |
| Georges Billy als Quaglino Diner (uncredited) |
| Jean-Paul Blonday als Quaglino Diner (uncredited) |
| Pierre Vaudier als Quaglino Diner (uncredited) |
| Charles Cullum als English Colonel (uncredited) |
| Roger LaVern als Soldier on Guard (uncredited) |
 | Charles Herbert als (uncredited) |
| Vincente Minnelli | Director |
| William Douglas-Home | Theatre Play |
| William Douglas-Home | Screenplay |
| Julius J. Epstein | Screenplay |
| Eddie Warner | Original Music Composer |
| Joseph Ruttenberg | Director of Photography |
| Pandro S. Berman | Producer |
| Adrienne Fazan | Editor |
| Jean-André d'Eaubonne | Art Direction |
| Robert Christidès | Set Decoration |
| William McGarry | Assistant Director |
| Kathryn Hereford | Associate Producer |
| John Truwe | Makeup Artist |
| Jean Paul Ulysse | Makeup Artist |
| Guy Rophé | Sound Mixer |
| Guy Villette | Sound Assistant |
| Helen Rose | Wardrobe Supervisor |
