For which film did Kieran Culkin win the Oscar for Best Supporting Actor?

For which film did Ke Huy Quan win the Oscar for Best Supporting Actor? Who won the Oscar for Best Supporting Actor for 'Oppenheimer'? For which film did Robert Downey Jr. win the Oscar for Best Supporting Actor? Who won the Oscar for Best Supporting Actor for 'A Real Pain'? Who won the Oscar for Best Supporting Actress for 'Girl, Interrupted'? For which film did Angelina Jolie win the Oscar for Best Supporting Actress? Who won the Oscar for Best Supporting Actress for 'Pollock'? For which film did Marcia Gay Harden win the Oscar for Best Supporting Actress?