 | Jerry Lewis als George Lester |
 | Terry-Thomas als H. William Homer |
 | Jacqueline Pearce als Pamela Lester |
 | Bernard Cribbins als Fred Davies |
 | Patricia Routledge als Lucille Beatty |
 | Nicholas Parsons als Dudley Heath |
 | Michael Bates als Dr. Spink |
 | Marianne Stone als Air Passenger |
 | Colin Gordon als Mr. Hartford |
 | John Bluthal als Dr. Pinto |
 | Margaret Nolan als Spink's Nurse |
 | Harold Goodwin als Six-Eyes Wiener |
 | Niké Arrighi als Portuguese Waitress |
 | John Barrard als Zebra Man |
 | Robert Lee als Bruce |
| John Moore als Digby |
| Ishaq Bux als Mr. Kali |
| Jerry Paris | Director |
| Michael Walter | Key Grip |
| Ken Ritchie | Sound Recordist |
| Pamela Cornell | Set Dresser |
| David Wynn-Jones | Assistant Camera |
| Walter Shenson | Producer |
| Otto Heller | Director of Photography |
| John Howell | Art Direction |
| Basil Rayburn | Production Manager |
| Bill Lenny | Editor |
| Maxine Leighton | Wardrobe Designer |
| Godfrey A. Godar | Camera Operator |
| Douglas Hermes | Assistant Director |
| Eileen Head | Continuity |
| Jeanne Henderson | Sound Editor |
| Harry Frampton | Makeup Artist |
| Benny Royston | Makeup Artist |
| Joan Telfer | Hairdresser |
| Nolan Roberts | Sound Recordist |
| Gabriella Falk | Wardrobe Coordinator |
| Leo Kharibian | Choreographer |
| Jean Fairlie | Wardrobe Supervisor |
| Charles Guerin | Wardrobe Supervisor |
| David Whitaker | Original Music Composer |
| Leon Becker | Associate Producer |
| Max Wilk | Screenplay |
| Max Wilk | Novel |
