For which film did Rachel Weisz win the Oscar for Best Supporting Actress?

For which film did Renée Zellweger win the Oscar for Best Supporting Actress? Who won the Oscar for Best Supporting Actress for 'The Aviator'? For which film did Cate Blanchett win the Oscar for Best Supporting Actress? Who won the Oscar for Best Supporting Actress for 'The Constant Gardener'? Who won the Oscar for Best Supporting Actress for 'Dreamgirls'? For which film did Jennifer Hudson win the Oscar for Best Supporting Actress? Who won the Oscar for Best Supporting Actress for 'Michael Clayton'? For which film did Tilda Swinton win the Oscar for Best Supporting Actress?