 | David Niven als Miles Doughton |
 | Shirley MacLaine als Meg Wheeler |
 | Gig Young als Evan Doughton |
 | Rod Taylor als Ross Taford |
 | Jim Backus als Mr. Maxwell |
 | Claire Kelly als Lisa |
 | Elisabeth Fraser als Jennie Boyden |
 | Dodie Heath als Terri Richards |
 | Read Morgan als Bert |
 | Carmen Phillips als Refined Young Lady |
 | Helen Wallace als Hotel Manager (uncredited) |
 | Sandra Warner als Gabrielle (uncredited) |
 | Larri Thomas als Bonny (uncredited) |
 | Sandra Giles als Abbie (uncredited) |
| Barbara English als Clarissa (uncredited) |
| Jeanne Westmore als Candy (uncredited) |
 | Reginald Simpson als Information Clerk (uncredited) |
| James Maloney als Moonface (uncredited) |
 | Mickey Shaughnessy als Mr. Eager (uncredited) |
| Aileen Carlyle als Mrs. Rumple (uncredited) |
 | Lela Bliss als Mrs. Webson (uncredited) |
| Wilson Wood als Detective (uncredited) |
 | Robert Foulk als Lt. O'Shea (uncredited) |
 | Percy Helton als Janitor (uncredited) |
 | Albert Carrier als Etienne (uncredited) |
 | Mae Clarke als Woman on Train (uncredited) |
| Charles Walters | Director |
| Joe Pasternak | Producer |
| Helen Rose | Costume Design |
| John McSweeney Jr. | Editor |
| Irving Aaronson | Producer's Assistant |
| George Wells | Screenplay |
| Winifred Wolfe | Novel |
| Jeff Alexander | Original Music Composer |
| Jeff Alexander | Conductor |
| Dorothy Fields | Lyricist |
| Jimmy McHugh | Songs |
| Jimmy McHugh | Music |
| Robert J. Bronner | Director of Photography |
| William A. Horning | Art Direction |
| Urie McCleary | Art Direction |
| Henry Grace | Set Decoration |
| F. Keogh Gleason | Set Decoration |
| Robert R. Hoag | Special Effects |
| Franklin Milton | Recording Supervision |
| Charles K. Hagedon | Other |
| Al Jennings | Assistant Director |
| Sydney Guilaroff | Hairstylist |
| William Tuttle | Makeup Artist |
