Tatum O'Neal is an American actress and author who rose to fame at a very young age. She became the youngest person to ever win a competitive Academy Award, earning the Best Supporting Actress honor for her role in the 1973 film "Paper Moon" at the age of 10. While she continued to act in films like "Bad News Bears" and "Nickelodeon," her career was often overshadowed by personal struggles, including drug addiction and a tumultuous marriage to tennis star John McEnroe. O'Neal has since written memoirs detailing her experiences and has continued to work in television and film, maintaining a presence in the public eye.