Walt Disney is one of the most recognized individuals of the early 20th century. A pioneering businessman, animator, and filmmaker, he is best remembered for his numerous contributions to American popular culture. These include co-creating the iconic character Mickey Mouse alongside legendary animator Ub Iwerks, co-founding the Walt Disney Corporation in 1923 with his brother, Roy O. Disney, and his theme park, Disneyland, which opened in 1955. A heavy smoker, Walt died on December 15, 1966, due to complications from lung cancer, but his company went on to become one of the largest media conglomerates in the world.