 | Jerry Lewis als Clayton Poole |
 | Marilyn Maxwell als Carla Naples |
 | Connie Stevens als Sandra Naples |
 | Salvatore Baccaloni als Gigi 'Papa' Naples |
 | Reginald Gardiner als Harold Hermann |
 | Ida Moore als Miss Bessie |
 | Gary Lewis als Young Clayton |
 | Isobel Elsom als Mrs. Van Cleeve |
 | James Gleason als Doc Simpkins |
 | Hans Conried als Mr. Wright |
 | Hope Emerson als Mrs. Rogers |
 | Alex Gerry als Judge Jenkins |
 | Mary Treen als Nurse |
 | Judy Franklin als Young Carla |
 | Will Wright als Fire Chief (uncredited) |
| Mary Foran als Miss Menefee (uncredited) |
| Dickie Humphreys als Dancer / Actor (uncredited) |
| Frank Tashlin | Director |
| Frank Tashlin | Screenplay |
| Frank Tashlin | Story |
| Sy Devore | Wardrobe Designer |
| Haskell B. Boggs | Director of Photography |
| Hal Pereira | Art Direction |
| Tambi Larsen | Art Direction |
| John P. Fulton | Special Effects |
| Sam Comer | Set Decoration |
| Robert R. Benton | Set Decoration |
| Rudy Makoul | Dialogue Coach |
| Charles C. Coleman | Assistant Director |
| Alma Macrorie | Editor |
| Wally Westmore | Makeup Supervisor |
| Nellie Manley | Hair Supervisor |
| Gene Merritt | Sound Recordist |
| Charles Grenzbach | Sound Recordist |
| Walter Scharf | Original Music Composer |
| Edith Head | Costume Design |
| Ernest D. Glucksman | Associate Producer |
| Jerry Lewis | Producer |
| Preston Sturges | Story |
| Jack Mintz | Producer's Assistant |
| Nick Castle | Choreographer |
