The Lost World was filmed as a silent motion picture for First National productions and released in 1925. It was directed by Harry O. Hoyt and stars Wallace Beery as Challenger. Willis H. O'Brien was responsible for the special effects. The effects are good but the performances mediocre.

In 1960, a new version of The Lost World was released by Twentieth Century-Fox. Written and directed by Irwin Allen, it stars Claude Rains as Challenger, David Hedison as Malone, Michael Rennie as Roxton, and Richard Haydn as Summerlee. L. B. Abbott directed the special effects team. The monsters of the film are lizards in make-up; some critics like them, although they look stupid, which makes them well suited to the clumsy movie.