Ballet Mécanique (1923-4) is a Dadaist post-Cubist art film conceived, written, and co-directed by the artist Fernand Léger in collaboration with the filmmaker Dudley Murphy (with cinematographic input from Man Ray). It has a musical score by the American composer George Antheil. However, the film premiered in silent version on 24 September 1924 at the Internationale Ausstellung neuer Theatertechnik (International Exposition for New Theater Technique) in Vienna presented by Frederick Kiesler. It is considered one of the masterpieces of early experimental filmmaking.