Frank Sinatra & Gene Kelly in Anchors Aweigh (1945). The movie is famous for a musical number where Gene Kelly dances seamlessly with the animated Jerry Mouse (Tom & Jerry). Originally, the producers wanted to use Mickey Mouse. Some sources claim Walt Disney initially agreed to loan out Mickey, but Roy Disney rejected the deal. According to Bob Thomas's book on Roy Disney, the studio was in debt after World War II and they were focusing on trying to get their own films out on time.