Nancy Cartwright is an American actress, voice actress, and comedian. She is best known for her long-running role as Bart Simpson on the animated television series The Simpsons. Cartwright voices other characters on the show, including Nelson Muntz, Ralph Wiggum, Todd Flanders, Kearney, and Database.
In becoming a voice-over artist for animation, she was mentored by Daws Butler. It was at Hanna-Barbera Productions where she began her professional voice acting career (playing Gloria in that studio's animated adaptation of Richie Rich). Outside of The Simpsons, her voice credits since then have included Daffney Gillfin from Snorks, Bright Eyes from Pound Puppies, Mindy from Animaniacs, and Chuckie Finster from Rugrats (who took over the role in 2002, following the retirement of Christine Cavanaugh).
Her Disney roles include voicing Pistol Pete in Goof Troop, Fawn Deer in Bonkers, Rufus in Kim Possible, Todd Daring in The Replacements, Pumbaa Jr. in Timon & Pumbaa, Toon Shoe in Who Framed Roger Rabbit, and Phantasmo and Shortstuff in Lilo & Stitch: The Series.