Sunrise: A Song of Two Humans is a 1927 American synchronized sound romantic drama directed by German director F. W. Murnau and starring George O'Brien, Janet Gaynor, and Margaret Livingston. While the film has no audible dialog, it was released with a synchronized musical score with sound effects using the Movietone sound-on-film process. The story was adapted by Carl Mayer from the short story "The Excursion to Tilsit", from the 1917 collection with the same title by Hermann Sudermann.

The Movietone sound system is an optical sound-on-film method of recording sound for motion pictures that guarantees synchronization between sound and picture. It achieves this by recording the sound as a variable-density optical track on the same strip of film that records the pictures. The initial version was capable of a frequency response of 8500 Hz. Although modern sound films use variable-area tracks instead, modern motion picture theaters can play a Movietone film without modification to the projector. Movietone was one of four motion picture sound systems under development in the U.S. during the 1920s, the others being DeForest Phonofilm, Warner Brothers' Vitaphone, and RCA Photophone, though Phonofilm was principally an early version of Movietone.