Bart Simpson (born April 1, 1980) is a fictional character in "The Simpsons". At the age of 10, he is the oldest child of 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.