Cinderella and Gus and Jaq
Cinderella (1950)

If you were stuck in a tower with no friends and an abusive family, wouldn't animals be your besties, too? Cinderella finds solace in her animal friends, the best of which are two nutty little mice, Gus and Jaq, who adorably call her "Cinderelly" and help her in many ways during the film, even freeing her near the end.