Which actress won the Oscar for Best Actress for the 2012 film 'Silver Linings Playbook'?

Jennifer Lawrence won the Oscar for Best Actress for the 2012 film Silver Linings Playbook. She played Tiffany Maxwell, a young widow who forms an unexpected bond with Pat Solitano, a man rebuilding his life after leaving a psychiatric hospital.

At the 85th Academy Awards, Lawrence defeated nominees including Jessica Chastain, Emmanuelle Riva, Quvenzhané Wallis, and Naomi Watts. She was 22 when she won, making her the second-youngest Best Actress winner at that time, behind Marlee Matlin.

Silver Linings Playbook received eight Oscar nominations, including Best Picture, Best Director, and nominations for all four acting categories. Lawrence's victory was the film's only win. A common mix-up is confusing her role with Anne Hathaway's Oscar-winning performance in Les Misérables at the same ceremony; Hathaway won Best Supporting Actress, not Best Actress.