 | Dolores Hart als Merritt Andrews |
 | George Hamilton als Ryder Smith |
 | Yvette Mimieux als Melanie Tolman |
 | Jim Hutton als TV Thompson |
 | Barbara Nichols als Lola Fandango |
 | Paula Prentiss als Tuggle Carpenter |
 | Chill Wills als Police Captain |
 | Frank Gorshin als Basil |
 | Rory Harrity als Franklin |
| Ted Berger als Stout Man on Beach |
| John Brennan als Dill |
 | Connie Francis als Angie |
 | Bess Flowers als Nightclub Patron (uncredited) |
 | Percy Helton als Fairview Motel Manager (uncredited) |
 | Vito Scotti als Maitre D' of The Tropical Isle (uncredited) |
 | Leoda Richards als Fainting Lady (uncredited) |
 | Jack Kruschen als Max (uncredited) |
 | Jon Lormer als Elderly Man Outside Motel (uncredited) |
 | Paul Frees als Narrator (uncredited) |
 | Harold Miller als Nightclub Patron (uncredited) |
 | Bert Stevens als Nightclub Patron (uncredited) |
 | Arthur Tovey als Nightclub Patron (uncredited) |
| Henry Levin | Director |
| Glendon Swarthout | Novel |
| George Wells | Screenplay |
| Robert J. Bronner | Director of Photography |
| George Stoll | Original Music Composer |
| Henry Grace | Set Decoration |
| Hugh Hunt | Set Decoration |
| George W. Davis | Art Direction |
| Kitty Mager | Costume Design |
| Fredric Steinkamp | Editor |
| E. Preston Ames | Art Direction |
| Joe Pasternak | Producer |
| Irving Aaronson | Producer's Assistant |
| Mary Keats | Hairstylist |
| John Truwe | Makeup Artist |
| William Tuttle | Makeup Artist |
| Al Jennings | Assistant Director |
| Franklin Milton | Recording Supervision |
| Lee LeBlanc | Special Effects |
| Robert Sidney | Choreographer |
