Multiple choice general knowledge Youngest winner of an acting award? Tatum O'Neal Justin Henry Jessica Tandy Gloria Stuart Reveal answer Fill a bubble to check yourself A Correct answer Explanation Tatum O'Neal was 10 years old when she won Best Supporting Actress for Paper Moon (1973), making her the youngest winner of an acting Oscar. Justin Henry was nominated at age 8 but didn't win. Jessica Tandy and Gloria Stuart won much later in life.