Directed by Harry O. Hoyt
Produced by Earl Hudson
Executive Producer : Jamie White
Based on Novel by Sir Arthur Conan Doyle
Screenplay by Marion Fairfax
Cinematography by Arthur Edeson
Film Editing by George McGuire
Song "The Lost World" by Rudolf Friml
Ape-man Makeup : Cecil Holland
Special Effects and Technical Director : Willis H. O'Brien
Model Construction : Marcel Delgado
1991 Alternate Version
Produced by Scott MacQueen
Music by R.J. Miller
2000 Alternate Version
Produced by Serge Bromberg, David H. Shepard
Cast
Miss Bessie Love (Miss Paula White)
Mr. Lewis Stone (Sir John Roxton)
Mr. Wallace Beery (Professor Challenger)
Mr. Lloyd Hughes (Edward E. Malone)
Miss Alma Bennett (Gladys Hungerford)
Mr. Arthur Hoyt (Professor Summerlee)
Miss Margaret McWade (Mrs. Challenger)
Mr. Bull Montana (Ape-Man)
Mr. Frank Smiles (Austin, Challenger's Butler)
Mr. Jules Cowles (Zambo, Roxton's Servant)
Mr. George Bunny (Colin McArdle)
Mr. Charles Wellesley (Major Hibbard)
Jocko (Himself, a Monkey)
Sir Arthur Conan Doyle (Himself)
Virginia Brown Faire (Marquette, the Half-Caste Girl)
Nelson McDowell (Lawyer Advising the Editor)
Gilbert Roland (Extra)
Leo White (Percy Potts)