Bart Simpson is a fictional character in the animated television series The Simpsons and part of the eponymous family. He is voiced by actress Nancy Cartwright and first appeared on television in The Tracey Ullman Show short "Good Night" on April 19, 1987. Bart was created and designed by cartoonist Matt Groening while he was waiting in the lobby of James L. Brooks' office. While the rest of the characters were named after Groening's family members, Bart's name was an anagram of the word brat. At ten years old, Bart is the eldest child and only son of Homer and Marge, and the brother of Lisa and Maggie. Bart's most prominent character traits are his mischievousness, rebelliousness and disrespect for authority.
Cartwright originally planned to audition for the role of Lisa, but instead auditioned for Bart, which she thought was a better role. Hallmarks of the character include his chalkboard gags in the opening sequence; his prank calls to Moe the bartender; and his catchphrases "Eat my shorts", "¡Ay, caramba!", and "Don't have a cow, man!" During the first two seasons of The Simpsons (1989–1991), Bart was the show's breakout character and "Bartmania" ensued. Bart Simpson T-shirts sporting various slogans and catchphrases became popular, selling at a rate of a million per day at their peak. Time named Bart one of the 100 most important people of the 20th century, and he was named "entertainer of the year" in 1990 by Entertainment Weekly.