Jerry Lewis

as Self

as Self (archive footage)

as Jim's Father

as Bellboy

as Self (archive footage)

as Self (archive footage)

as Self

as Stationmaster (voice)

as Professor Julius Kelp / Buddy Love

as Self

as George Fawkes

as Leo Sweetie

as Arnold Ross

as Dr. Bernard Abrams

as Jerry Langford

as Wilbur Swain / Caleb Swain

as Peter J. Ingersoll / Fred Dobbs

as Pete Mattemore

as Robert Reed

as Jerome Littlefield

as Norman Phiffer

as Lester March

as Cinderfella

as Kreton

as John Paul Steckler I / John Paul Steckler IV / John Paul Steckler VII

as Gilbert Wooley

as Clayton Poole

as Private Meredith C. Bixby

as Sidney L. Pythias

as Malcolm Smith

as Wade Kingsley Jr. / Wade Kingsley Sr.

as Eugene Fullstack

as Wilbur Hoolick

as Jerry Hotchkiss

as Homer Flagg

as Virgil Yokum

as Harvey Miller

as Myron Mertz

as Woman in Lala's Dream (uncredited)

as Hap Smith

as Melvin Jones

as Ted Rogers

as 'Junior' Jackson

as Private Korwin

as Seymour

as Seymour