The voice of Bart Simpson says don't have a cow about the movie.

Byline: Roger Moore

It was destiny that put Nancy Cartwright's voice in the mouths of so many TV cartoon characters, beginning in the 1980s. As a kid, Cartwright made the great voice actor Daws Butler a pen pal. He's the man who put "PIC-a-nic" basket into Yogi Bear's vocabulary. Cartwright wanted to be just like him.

In the decades since, Cartwright's been fulfilling that destiny on everything from "My Little Pony" to "Rugrats," "Kim Possible" and "The Family Guy."

But fate intervened 20 years ago when she was picked to do the voice of one of the icons of American popular culture, Bart Simpson.

"I usually bring three or four choices for a voice when I audition," she says from Los Angeles. "Their idea of a 10-year-old boy might be different from yours. But for that one, I gambled. One voice. I was hired on the spot."

Now, a 49-year-old divorced mother of two, an actress …