The Sap is a 1929 American sound part-talkie comedy film directed by Archie Mayo and written by De Leon Anthony and Robert Lord. In addition to sequences with audible dialogue or talking sequences, the film features a synchronized musical score and sound effects along with English intertitles. The soundtrack was recorded using the Vitaphone sound-on-disc system. The film is based on the 1924 play The Sap by William A. Grew. The film stars Edward Everett Horton, Alan Hale Sr., Patsy Ruth Miller, Russell Simpson, Jerry Mandy and Edna Murphy. The film was released by Warner Bros. on November 9, 1929. This film was the last "part-talkie" produced by the studio.