Betrayal is a 1929 American Synchronized 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.

[5] Swiss peasant girl Vroni (Esther Ralston) is having a secret summer romance with Viennese artist Andre Frey (Gary Cooper).

When Andre later returns to Switzerland, he learns that Vroni has been forced to marry wealthy burgomeister Poldi Moser (Emil Jannings).

Poldi learns the truth of the relationship while attending Vroni's funeral, and swears vengeance but discovers that Andre has died from the severity of his injuries.