 | Jerry Lewis als John Paul Steckler I / John Paul Steckler IV / John Paul Steckler VII |
 | Dina Merrill als Ens. Rita J. Benson |
 | Diana Spencer als Prudence Trabert Steckler |
 | Mickey Shaughnessy als Stan Wychinski |
 | Robert Middleton als Vice Adm. Philo Tecumseh Bludde |
 | Gale Gordon als Congressman Mandeville |
 | Mabel Albertson als Mrs. Trabert |
 | Claude Akins als Lt. Cmdr. Farber |
 | Hugh Sanders als Adm. Rogers |
 | Richard Shannon als Cmdr. Cross |
 | Chuck Wassil als Cmdr. Craig |
| Burt Metcalfe als Lt. Bond |
 | Pamela Duncan als Lt. Ward |
 | Karl Lukas als Dugan |
| Norman Taurog | Director |
| Herbert Baker | Screenplay |
| Edmund Beloin | Screenplay |
| Henry Garson | Screenplay |
| Ellis Kadison | Story |
| Murray Young | Grip |
| Haskell B. Boggs | Director of Photography |
| Walter H. Tyler | Art Direction |
| Hal Pereira | Art Direction |
| John P. Fulton | Special Effects |
| Sam Comer | Set Decoration |
| Ray Moyer | Set Decoration |
| Michael D. Moore | Second Unit Director |
| Edith Head | Costume Design |
| Wally Westmore | Makeup Supervisor |
| Nellie Manley | Hair Supervisor |
| Michael D. Moore | Assistant Director |
| Gene Merritt | Sound Recordist |
| Winston H. Leverett | Sound Recordist |
| Paul Nathan | Associate Producer |
| Walter Scharf | Original Music Composer |
| Jack Mintz | Dialogue Coach |
| Hal B. Wallis | Producer |
