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Betrayal is a 1929 American sound drama film produced for Famous Players–Lasky and released by Paramount Pictures. While the film has no audible dialog, it was released with a synchronized musical score with sound effects using both the sound-on-disc and sound-on-film process. The film is the last film without audible dialogue that was directed by Lewis Milestone, the last non-speaking role performance by Gary Cooper, the last non-speaking performance by Germany's Emil Jannings, and the only onscreen pairing of Cooper and Jannings. It is considered a lost film.