Daniel Louis 'Dan' Castellaneta (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 voices many other characters on The Simpsons, including Abraham 'Grampa' Simpson, Barney Gumble, Krusty the Clown, Groundskeeper Willie, Mayor Quimby and Hans Moleman. Born in Oak Park, Illinois, a suburb of Chicago, Castellaneta started taking acting classes at a young age. He would listen to his father's comedy records and do impressions of the artists. After graduating from Northern Illinois University, Castellaneta joined Chicago's Second City in 1983, and performed with the troupe until 1987. He was cast in The Tracey Ullman Show, which debuted in 1987.
Contributions by TMC1982, Cydebot, and Wafulz.