Larson won for "Room," in which she plays a woman who gives birth to a son after being kidnapped and held captive for years. She attempts to give her son a sense of normalcy until circumstances force her to plot an escape.
It was the 26-year-old actress' first Oscar nomination. She also won Golden Globe and Screen Actors Guild Awards for her work on the film, which is adapted from an Emma Donoghue novel.
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