The Wild Man of Borneo

Frank Morgan

J. Daniel 'Dan' Thompson

Mary Howard

Mary Thompson

Billie Burke

Bernice Marshall, Boardinghouse Keeper

Donald Meek

Professor Charles W. Birdo

Marjorie Main

Irma, the Cook

Connie Gilchrist

Mrs. Evelyn Diamond

Bonita Granville

Francine 'Frankie' Diamond

Dan Dailey

Ed LeMotte (as Dan Dailey Jr.)

Andrew Tombes

'Doc' Dunbar

Walter Catlett

'Doc' Skelby

Joseph J. Greene

Mr. Robert Emmett Ferderber, Private Detective

Phil Silvers

Murdock, Side Show Barker

Irving Bacon

Carriage Driver (uncredited)

James Flavin

Policeman (uncredited)

Mayta Palmera

Little Cairo (uncredited)

Betty Farrington

Little Lady Buying Soap (uncredited)