"A white youth raised in the jungle by animals is captured by a safari and brought back to civilization as an attraction in a circus."
Buster Crabbe
as Kaspa
Frances Dee
as Ann Rogers
Sidney Toler
as Neil Forbes
Nydia Westman
as Sue
Robert Barrat
as Joe Nolan
Irving Pichel
as Corey
Douglass Dumbrille
as Ed Peters
Sam Baker
as Gwana
Patricia Farley
as Kitty
Ronnie Cosby
as Kaspa, aged 3
Robert Adair
as John C. Knolls (uncredited)
Thomas Amos
as Bit Role (uncredited)
Florence Britton
as Mrs. Edith Knolls (uncredited)
Don Brodie
as Reporter (uncredited)
Leonard Carey
as Clerk at Hunting License Bureau (uncredited)
Nora Cecil
as Spinster in park (uncredited)
William R. Dunn
Harold Farley
Sam Farrell
William J. Kelly
as Government Inspector (uncredited)
Fred Kelsey
as Cop (uncredited)
Edward LeSaint
as Policeman (uncredited)
Tom London
as Lion Attendant (uncredited)
Lee Phelps
as Customs Inspector (uncredited)
F.M. Pitts
Warner Richmond
as Gus (uncredited)
Mabel Stark
Harry Strang
Phil Tead
George Turner
E. Lloyd Sheldon
Associate Producer
Charles Thurley Stoneham
Novel
Gordon Jennings
Special Effects
Max Marcin
Adaptation
H. Bruce Humberstone
Director
Philip Wylie
Screenplay
Fred Niblo Jr.
Herman Hand
Original Music Composer
Harry D. Mills
Sound
Mel Ballerino
Casting
Stunts
Ernest Haller
Director of Photography
Jules White
Assistant Director
John Leipold
Rudolph G. Kopp
Fred A. Datig