Born in Germany in 1909, he moved to the United States where he became a key figure in animation. A longtime collaborator with Walt Disney, he joined Disney Studios in 1933. Over the years, he worked as an animator on classics like "Snow White and the Seven Dwarfs" and "Fantasia." He later directed several beloved Disney films, including "The Jungle Book," "Robin Hood," and "The Aristocats." Known for his dynamic action sequences, he played a vital role in shaping Disney's animated legacy until his retirement in 1981.