Pluto (also known as Pluto the Dog) is a fictional character made famous in a series of Disney short cartoons. Pluto, has most frequently appeared as Mickey Mouse's pet dog. He also had an independent starring role in a number of Disney shorts in the 1940s and 1950s. Pluto is unusual for a Disney character in that he is not anthropomorphized beyond showing an unusually broad range of facial expressions; he is actually represented as a normal dog, although when the character appears at Disney theme parks, he walks upright on his two hind legs.