Bart Simpson is a fictional character in "The Simpsons". At the age of 10, he is the oldest child of three children to Marge and Homer Simpson. He is the brother of Lisa and Maggie. Bart is someone who does not like school. At the time when the Simpsons was launched T-shirts were released that had a picture of Bart saying "Underachiever. And proud of it". Nancy Cartwright is the voice of Bart. Bart had a 10 year old love interest named Niki/Nikki. He's a skateboarder. He made his first appearance in the Simpson short, "Good Night", on "The Tracey Ullman Show".