Bart (a.k.a. El Barto) is the eldest child of Homer and Marge Simpson. Bart attends Springfield elementary school where he is in the fourth grade or more often, the principal's office. Coined as the "Underachiever" of his family, Bart seems to always get himself in trouble. Some of his more noteworthy antics include prank calling Moe's tavern, vandalising the neighbourhood, international fraud, teasing his sister Lisa ... etc. etc.

Despite his trouble-making and poor grades in school, Bart has had some clever ideas and exciting adventures. A few such adventures include coordinating a war against school bully Nelson, foiling his arch enemy Sideshow Bob twice and he is also appeared on the Krusty the Klown show as the "I Didn't Do it Boy." Bart also discovered a comet and the three eyed, nuclear infested fish, "Blinky."

Some of Bart's favourite hobbies include watching Krusty the Klown and the Itchy & Scratchy Show, skateboarding, hanging out with his best friend Milhouse, practical jokes, playing video boxing and driving Homer nuts.

Age: 10 years old
Occupation: Grade 4 student, troublemaker
Hobbies: Skateboarding, watching Krusty the Klown and Itchy & Scratchy, causing trouble, prank phone calls, practical jokes
Pet Peeves: Martin Prince, Nelson Muntz, overachievers, school, being sent to the principal's office
Typical Sayings: "Aye Carumba," "Eat my shorts," "Don't have a cow man," "I didn't do it"

The Voice of Bart Nancy Cartwright plays the underachieving, prankster Bart Simpson. Cartwright, who joined the Tracey Ullman show in 1987, was no stranger to cartoons before joining the cast of the Simpsons. She has done voice work for such cartoons as: "Animaniacs", "Goof Troop", "Snorks", "Glo-Friends", "Pound Puppies", "Galaxy High", "Fantastic Max", "Richie Rich", "My Little Pony". Other acting credits include brief appearances on "Cheers", "Mr. Belvedere" the movie, "Flesh and Blood" and other feature films.Cartwright had initially auditioned for the role of Lisa, but the producers felt she was better suited for the role of Bart. She is also the voice of other Simpsons characters such as Nelson Muntz, Kearney, Todd Flanders, Ralph Wiggum, Database and Jimmy.