In 1928, Walt Disney created cartoon icon Mickey Mouse, who made his debut in the silent film Plane Crazy. That same year, Mickey also appeared in Steamboat Willie, written and directed by Disney and animator Ub Iwerks. An immediate hit, the film was Disney’s first attempt at using sound and the first fully synchronized sound cartoon. Music is prominently featured, and Mickey first appears in the film whistling the song Steamboat Bill. Who provided the voice for Mickey? Discuss