Nancy Campbell Cartwright (born October 25, 1957) is an American film and television actress, comedian and voice artist. She is best known for her long-running role as Bart Simpson on The Simpsons. She is also the aunt of pop star Sabrina Carpenter.
Bernard is a jittery mouse who works as a janitor at the Rescue Aid Society, an international mouse organization headquartered in New York shadowing the United Nations. He's paired up with a Hungarian mouse named Bianca to rescue a little girl in the Bayou.
