Fun and Fancy Free
Disney had provided the voice for Mickey Mouse since his debut in 1928, and "Fun and Fancy Free" was the last time he would voice the role regularly, as he no longer had the time or energy to do so. Disney recorded most of Mickey's dialogue in the spring and summer of 1941. Sound effects artist Jimmy MacDonald would become the character's new voice actor, starting in 1948. Disney, however, did reprise the role for the introduction to the original 1955–59 run of "The Mickey Mouse Club".
Steamboat Willie
Steamboat Willie is a 1928 American animated short film directed by Walt Disney and Ub Iwerks. It was produced in black-and-white by Walt Disney Studios and was released by Celebrity Productions. The cartoon is considered the debut of Mickey Mouse and his girlfriend Minnie, although both the characters appeared several months earlier in a test screening of "Plane Crazy". "Steamboat Willie" was the third of Mickey's films to be produced, but was the first to be distributed because Walt Disney, having seen "The Jazz Singer", had committed himself to producing one of the first fully synchronized sound cartoons. The real first cartoon with synchronized sound was My Old Kentucky Home.