Who is the youngest and the oldest actor to win Oscar?

Tatum O'Neal became the youngest-ever actor to win an Oscar after being named 'Best Supporting Actress' aged 10 years and 106 days at 46th Academy Awards in 1974. Tatum won Oscar for 'Paper Moon'. Anthony Hopkins became the oldest actor to win Oscar after bagging 'Best Actor' Oscar for 'The Father' in 2021 aged 83 years and 115 days.