Nancy Campbell Cartwright (born October 25, 1957) is an American Film and Television Actress, Comediene and Voice Artist.
She voiced Bart Simpson, Nelson Muntz, Ralph Wiggum, Todd Flanders, Kearney, and Database on The Simpsons, Chuckie Finster on Rugrats and All Grown Up! (replacing Christine Cavanaugh after her retirement), Lady on Thomas and the Magic Railroad, Mindy on Animaniacs, Rufus on Kim Possible, F.X. on Fantastic Max, Bright Eyes on Pound Puppies, and Pistol on Goof Troop.