Who was the youngest person to win an Oscar?

The youngest ever Oscar winner is actress, Tatum O’Neal who was only ten years old when she won Best Supporting Actress for the film, Paper Moon.

Tatum is an American actress and author. She is the youngest person ever to win a competitive Academy Award, winning at age 10 for her performance as Addie Loggins in Paper Moon (1973) opposite her father, Ryan O’Neal.

She also starred as Amanda Wurlitzer in The Bad News Bear(1973), followed by Nickelodeon and Little Darlins. She later appeared in guest roles in Sex and the City, 8 simple Rules and Law & Order: Criminal Intent. 

From 2006 to 2007, she portrayed Blythe Hunter in the My Network TV Drama series, Wicked Wicked Games.