<P> Nancy Cartwright ( born October 25 , 1957 ) is an American voice actress and comedian . She is known for her long - running role as Bart Simpson on the animated television series The Simpsons . Cartwright also voices other characters for the show , including Nelson Muntz , Ralph Wiggum , Todd Flanders , Kearney , and Database . </P>
<P> Nancy Cartwright ( born October 25 , 1957 ) is an American voice actress and comedian . She is known for her long - running role as Bart Simpson on the animated television series The Simpsons . Cartwright also voices other characters for the show , including Nelson Muntz , Ralph Wiggum , Todd Flanders , Kearney , and Database . </P>
who does the voice over for bart simpson
who does the voice over for bart simpson
Nancy Cartwright
Nancy Cartwright