Dayton native Nancy Cartwright gives voice to Bart, neighbors Rod and Todd Flanders and four others. And she's not surprised that Bart is celebrating his 10th birthday for a 10th time. She figured America would embrace the show, despite the firestorm over the first season. Many of Bart's trademark phrases were her ad-libs. Eat my shorts, man.
Producers have a long list of famous fans who have volunteered to get animated on the show.
Or they call up baseball star Mark McGwire out of the blue. If they have kids, like Mark McGwire, that's a big plus. The kids are really excited to see dad on the show. Don't have a cow, man. Some fans collect the writ and wisdom Bart scribbles on the blackboard for a few fleeting seconds in every show opening.