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".
Jimmy MacDonald (sound effects artist)
By 1947, Walt Disney was getting too busy and too hoarse from smoking to continue voicing Mickey Mouse, so he was replaced by MacDonald after the film "Fun and Fancy Free" (1947). MacDonald voiced Mickey Mouse until 1977, when he was replaced by young Disney sound-effects man Wayne Allwine for "The New Mickey Mouse Club"