<P> The Simpsons is an American animated sitcom that includes six main voice actors and numerous regular cast and recurring guest stars . The principal cast consists of Dan Castellaneta , Julie Kavner , Nancy Cartwright , Yeardley Smith , Hank Azaria and Harry Shearer . Tress MacNeille , Pamela Hayden , Maggie Roswell , Russi Taylor , Marcia Wallace , Marcia Mitzman Gaven and Karl Wiedergott have appeared as supporting cast members . Repeat guest cast members include Albert Brooks , Phil Hartman , Jon Lovitz , Joe Mantegna and Kelsey Grammer . With one exception , episode credits list only the voice actors , and not the characters they voice . </P>
who does all the voices on the simpsons
Dan Castellaneta Julie Kavner Nancy Cartwright Yeardley Smith Hank Azaria Harry Shearer