 |
Jerry Lewis as Professor Julius F. Kelp / Buddy Love / Baby Kelp |
 |
Stella Stevens as Stella Purdy |
 |
Del Moore as Dr. Hamius R. Warfield |
 |
Henry Gibson as Gibson, College Student |
 |
Kathleen Freeman as Millie Lemmon |
 |
Richard Kiel as Man in Gym (uncredited) |
 |
Norman Alden as Football Player |
 |
Howard Morris as Mr. Elmer Kelp |
 |
Elvia Allman as Edwina Kelp |
 |
Milton Frome as Dr. M. Sheppard Leevee |
 |
Doodles Weaver as Rube |
 |
Murray Alper as Gym Attendant (uncredited) |
 |
Buddy Lester as Bartender |
 |
Med Flory as Football Player |
 |
Seymour Cassel as Bored Man |
 |
Stephanie Hill as Waitress (uncredited) |
 |
Marvin Kaplan as English Student |
 |
Skip Ward as Football Player |
 |
Billy Bletcher as Plumber (uncredited) |
 |
Robert Donner as College Student (uncredited) |
 |
Art Gilmore as Narrator (voice) (uncredited) |
| Directing | Jerry Lewis | Director |
| Writing | Jerry Lewis | Writer |
| Writing | Bill Richmond | Writer |
| Production | Ernest D. Glucksman | Producer |
| Sound | Walter Scharf | Original Music Composer |
| Editing | John Woodcock | Editor |
| Production | Edward R. Morse | Casting |
| Art | Hal Pereira | Art Direction |
| Art | Robert R. Benton | Set Decoration |
| Camera | W. Wallace Kelley | Director of Photography |
| Camera | James Grant | Assistant Camera |
| Directing | Ralph Axness | Assistant Director |
| Costume & Make-Up | Edith Head | Costume Design |
| Costume & Make-Up | Sy Devore | Wardrobe Designer |
| Camera | Murray Young | Key Grip |
| Production | Arthur P. Schmidt | Associate Producer |
| Art | Walter H. Tyler | Art Direction |
| Art | Sam Comer | Set Decoration |
| Costume & Make-Up | Jack Stone | Makeup Artist |
| Crew | Paul K. Lerpae | Special Effects |
| Costume & Make-Up | Wally Westmore | Makeup Supervisor |
| Costume & Make-Up | Nellie Manley | Hair Supervisor |
| Directing | Dorothy Yutzi | Script Supervisor |
| Art | Martin Pendleton | Property Master |
| Crew | Marvin Weldon | Dialogue Coach |
| Sound | Hugo Grenzbach | Sound Recordist |
| Sound | Charles Grenzbach | Sound Recordist |
| Production | William Davidson | Production Manager |
| Production | Hal Bell | Assistant Production Manager |
| Production | Marshall Katz | Producer's Assistant |
| Writing | რობერტ ლუის სტივენსონი | Original Story |
