Daniel Louis "Dan" Castellaneta (ˈdæn_ˌkæstələˈnɛtə; born October 29, 1957) is an American actor, voice actor, comedian and screenwriter. Noted for his long-running role as Homer Simpson on the animated television series The Simpsons, he also voices many other characters on the show, including Abraham "Grampa" Simpson, Barney Gumble, Krusty the Clown, Sideshow Mel, Groundskeeper Willie, Mayor Quimby and Hans Moleman. Castellaneta has also had roles in several other television programs, including the live-action sitcom Sibs, The Adventures of Dynamo Duck, and the animated series Back to the Future: The Animated Series, Earthworm Jim, Aladdin (Genie), Hey Arnold!, Rugrats, Futurama, and Darkwing Duck. In 1999, he appeared in the Christmas special Olive, the Other Reindeer and won an Annie Award for his portrayal of the Postman. Castellaneta has also released a comedy CD, I Am Not Homer, and wrote and starred in a one-person show titled Where Did Vincent van Gogh?