Eugene Curran "Gene" Kelly was an American dancer, actor, singer, film director, producer, and choreographer.
For Disney, Kelly made an appearance in the TV special, Mickey's 50, guest-starred on The Muppet Show in episode 501 and appears as an audio-animatronic figure in the Singin' in the Rain scene of The Great Movie Ride.
Originally, Mickey Mouse was going to appear in the dancing sequence from Kelly's 1945 film, Anchors Aweigh. Some sources claim Walt Disney initially agreed to loan out Mickey, but Roy O. Disney rejected the deal. According to Bob Thomas's book on Roy, the studio was in debt after World War II and they were focusing on trying to get their own films out on time. According to Roy, they had no business making cartoons for other people. So at the last minute, Mickey's appearance in the film was replaced by Tom and Jerry, MGM's famous cartoon stars at that time.