Mickey Mouse and Ub Iwerks. Iwerks again served as the head animator, assisted by Johnny Cannon, Les Clark, Wilfred Jackson and Dick Lundy. This short was intended as a parody of Buster Keaton's "Steamboat Bill, Jr.", first released on May 12 of the same year. Although it was the third Mickey cartoon produced, it was the first to find a distributor, and thus is considered by The Disney Company as Mickey's debut. "Willie" featured changes to Mickey's appearance (in particular, simplifying his eyes to large dots) that established his look for later cartoons and in numerous Walt Disney films. The cartoon was
Mickey Mouse original music. This role has been variously attributed to Wilfred Jackson, Carl Stalling and Bert Lewis, but identification remains uncertain. Walt Disney himself was voice actor for both Mickey and Minnie and would remain the source of Mickey's voice through 1946 for theatrical cartoons. Jimmy MacDonald took over the role in 1946, but Walt provided Mickey's voice again from 1955 to 1959 for "The Mickey Mouse Club" television series on ABC. Audiences at the time of "Steamboat Willie"'s release were reportedly impressed by the use of sound for comedic purposes. Sound films or "talkies" were still considered innovative. The first