Tatum Beatrice O'Neal (born November 5, 1963) is an American actress and author. She is the youngest person ever to win a competitive Academy Award, which she won at age 10 for her performance as Addie Loggins in Paper Moon (1973) opposite her father, Ryan O'Neal. She then starred in The Bad News Bears in 1976, followed by Nickelodeon, and Little Darlings.
O'Neal married professional tennis player John McEnroe in 1986, with whom she had three children. The couple separated in 1992 and were divorced in 1994.