Professor Julius Kelp/Buddy Love/Baby Kelp
Jerry Lewis
Stella Purdy
Stella Stevens
Stella Purdy
Stella Stevens
Dr. Hamius R. Warfield
Del Moore
Gibson
Henry Gibson
Millie Lemmon
Kathleen Freeman
Football Player
Med Flory
Mr. Elmer Kelp
Howard Morris
Mother Kelp
Elvira Allman
Dr. M. Sheppard Leevee
Milton Frome
Man in Gym (uncredited)
Richard Kiel
Football Player
Norman Alden
Edwina Kelp
Elvia Allman
Bartender
Buddy Lester
Football Player
Skip Ward
Rube
Doodles Weaver
English Boy
Marvin Kaplan
College Student
David Landfield
Gym Attendant (uncredited)
Murray Alper
College Student
Celeste Yarnall
Bored Man
Seymour Cassel
College Student
Francine York
Waitress (uncredited)
Stephanie Hill
College Student
Julie Parrish
Bartender
Dave Willock
Cab Driver
Mushy Callahan
Salesman Clothier
Gavin Gordon
Faculty Member
Joe Forte
Cigarette Girl
Terry Higgins
Boy
Gary Lewis
Student at Senior Prom
Les Brown Jr.
College Faculty Member
Joseph Forte
Narrator
Art Gilmore
Faculty Member at Senior Prom
Stuart Holmes
Faculty Member at Senior Prom
Forbes Murray
Musician - Percussionist
Emil Richards
Purple Pit Customer
Bert Stevens
Football Player
Roger Torrey
Himself
Les Brown