Steamboat Willie, an animated short film directed by Walt Disney, debuted this day in 1928. The cartoon is considered to be the debut of Mickey Mouse and his girlfriend Minnie and was the first fully synchronized sound cartoon.
In 1994, members of the animated field voted Steamboat Willie 13th in the book The 50 Greatest Cartoons that listed the greatest cartoons of all time. In 1998 the film was selected for preservation in the U.S. National Film Registry for being deemed “culturally, historically or aesthetically significant.”
(parts from Wikipedia)