Danica McKellar is an American actress and academic. She played Winnie Cooper in The Wonder Years and appeared in films such as Sidekicks, Crown for Christmas, Mommy, I Didn't Do It, and The Winter Palace. McKellar has also produced films including Christmas at Dollywood and MatchMaker Mysteries: A Fatal Romance. Beyond her acting career, she is an academic who co-wrote the Chayes-McKellar-Winn Theorem and graduated summa cum laude from UCLA with a degree in mathematics.