[[http://www.nancycartwright.com/ Nancy Cartwright]] (born October 25, 1957) has been doing cartoon voices since Creator/HannaBarbera's version of ''ComicBook/RichieRich'' in the early 1980s (after being personally trained by the legendary Creator/DawsButler), but is probably best known the world over for her voicework on the long-running FOX animated sitcom ''TheSimpsons'', where she is not only the voice of devious prankster Simpsons son, Bart, but also the voice of Ned Flanders' son, Todd[[note]]Rod is voiced by Pamela Hayden, who voices bully/teenage petty thug Jimbo Jones and Bart's loser friend, Milhouse van Houten[[/note]], dim-witted second grader (and son of the town's incompetent police chief) Ralph Wiggum, fourth-grade bully Nelson Muntz, over-aged elementary school bully, petty thug, and (allegedly) teenaged father Kearney Zzyzwicz[[note]]Kearney's last name is Polish and pronounced "jeez-WICH". It was unknown until the season 18 episode "24 Minutes"[[/note]], and provides vocal effects (cooing, crying, and laughing) for youngest Simpsons child, Maggie. In addition, Cartwright is also an animation producer, responsible for NASCAR.com's WebAnimation series ''The Kellys''. She has adapted her book, ''My Life as a 10-Year-Old Boy'', into an audiobook and a one-woman stage show.

Cartwright has also appeared in live action, including Creator/JoeDante's segment of ''Film/TwilightZoneTheMovie'' and the MadeForTVMovie ''Marian Rose White'', and the American ''Franchise/{{Godzilla}}'' movie (which also had Creator/HankAzaria and Creator/HarryShearer of ''The Simpsons''), as well as making a guest appearance on an episode of ''Series/TwentyFour'' (the same season, stars Kiefer Sutherland and Mary Lynn Rajskub returned the favor by reprising their roles on ''24'' for a guest appearance on ''The Simpsons''). Originally, she was going to do voicework on ''WesternAnimation/SouthPark'', but turned it down due to its vulgar content. She even was a celebrity guest on Tom Bergeron's ''Series/TheHollywoodSquares'' and Donny Osmond's ''Series/{{Pyramid}}''.

Outside show business, Cartwright is a prominent member of the [[ChurchOfHappyology Church of Scientology]].

!! Cartwright has done character voices for the following works:
* ''ComicBook/RichieRich'' (Hanna-Barbera's version, as Gloria)
* ''WesternAnimation/ShirtTales'' (season 2 only, as Kip Kangaroo)
* ''WesternAnimation/TheSnorks''
* ''ComicStrip/{{Popeye}} and Son''
* ''WesternAnimation/SaturdaySupercade'' (season 2 only, in "Space Ace" segments)
* ''WesternAnimation/GalaxyHigh''
* ''WesternAnimation/{{Animaniacs}}'' (Mindy, additional voices)
* ''WesternAnimation/TheSimpsons'' (Bart Simpson, Ralph Wiggum, Nelson Muntz, Kearney [the bully who [[OlderThanTheyLook looks like a teenager, but isn't]]], Todd Flanders, and any one-shot boy characters. Cartwright also provides vocal effects [mostly cooing, laughing and crying] for Maggie Simpson and was the replacement voice for Creator/ElizabethTaylor when the season 13 episode of ''The Simpsons'' showed a clip from season 4's "Lisa's First Word", where Maggie finally says her first word [[spoiler:"Daddy"]] after Homer wishes that she never speak)
* ''WesternAnimation/{{Rugrats}}'' (Chuckie season 8 onward)
* ''WesternAnimation/GoofTroop'' (Pistol Pete)
* ''WesternAnimation/TheCritic'' (Margo Sherman, various)
* ''WesternAnimation/KimPossible'' (Rufus)
* ''WesternAnimation/TheReplacements'' (Todd Daring)
* ''WesternAnimation/MikeLuAndOg'' ([[InsistentTerminology Princess]] Lu)
* ''[[VideoGame/PuttPutt Putt-Putt]]'' (''Enters the Race'', ''Joins the Circus'', and ''One-Stop Fun Shop'' only, as Putt-Putt)
* ''WesternAnimation/MyLittlePonyTheMovie'' and ''WesternAnimation/MyLittlePonyAndFriends'': Gusty the unicorn, Posey the earth pony.
* ''WesternAnimation/PoundPuppies1980s'': Bright Eyes
* ''WesternAnimation/{{Bonkers}}'': Fawn Deer.
* ''WesternAnimation/{{Toonsylvania}}'': Melissa Screetch
* ''WesternAnimation/FantasticMax'': FX.