Nancy Jean Cartwright is an American actress and voice actress. She is best known for her long-running role as Bart Simpson on the popular Fox animated sitcom The Simpsons, as well as numerous other characters including Nelson Muntz, Ralph Wiggum, Todd Flanders, Kearney Zzyzwicz, 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 (in which she played Gloria Glad in that studio's animated adaptation of Richie Rich). Outside of The Simpsons, her voice credits since then have included Daffney Gillfin in Snorks, Bright Eyes in the 1986 series Pound Puppies, Mindy in the Warner Bros. animated series Animaniacs, and Chuckie Finster in the Nickelodeon series Rugrats (taking over the role in 2002 after the retirement of Christine Cavanaugh).

Filmography

List of voice performances in feature and direct-to-video films

Year	Title	Role	Notes
1987	The Chipmunk Adventure	Arabian Prince, Additional voices
1998	The Land Before Time VI: The Secret of Saurus Rock	Dana	Direct-to-video release[1]
2017	Captain Underpants: The First Epic Movie	Unknown