Voice actors behind Mickey Mouse are:
When the show originali started in 1940 Mickey Mouse's voice was done by the owner of Disney, Mickey Mouse and he continued to do it until 1955. He and his studious created many other famous cartoon characters like Donald Duck and Goofy. When the series were revived in 1983 Walt Disney was dead, an his place was taken by Wayne Allwine as the voice of Mickey Mouse.
Live impersonation of Mickey Mouse by Walt Disney
Live impersonation of Mickey Mouse by Wayne Allwine