After several silent movies and film serials based on Burroughs' books about the title character, the movie "Tarzan the Ape Man" was made in 1932, starring actor Johnny Weissmuller as Tarzan and Maureen O'Sullivan as his love interest Jane. The movie spawned many sequels also starring Weissmuller, some of which included O'Sullivan as well. In the movies, Tarzan's trademark cry was created by audio effects which reportedly included a yodel played backward.
