Paula White
Bessie Love
Sir John Roxton
Lewis Stone
Colin McArdle
George Bunny
Maj. Hibbard
Charles Wellesley
Himself
Arthur Conan Doyle
Marquette
Virginia Brown Faire
Lawyer
Nelson McDowell
Extra
Gilbert Roland
Percy Potts
Leo White
Prof. Challenger
Wallace Beery
Edward E. Malone
Lloyd Hughes
Gladys Hungerford
Alma Bennett
Prof. Summerlee
Arthur Hoyt
Mrs. Challenger
Margaret McWade
Ape Man
Bull Montana
Challengers Diener
Frank Finch Smiles
Zambo
Jules Cowles
Makeup Artist
Cecil Holland
Director of Photography
Arthur Edeson
Special Effects
Willis H. O'Brien
Visual Effects
Author
Director
Harry O. Hoyt
Screenplay
Marion Fairfax
Producer
Earl Hudson
Editor
George McGuire
Perc Westmore
Art Direction
Milton Menasco
Marcel Delgado