Robert Downey Jr won an Oscar for best supporting actor in "Oppenheimer."

In the Christopher Nolan film, he played Oppenheimer's competitor, Lewis Strauss.

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After two prior nominations, this is Downey Jr.'s first Oscar win.

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Downey Jr. won a number of important honors for his performance, including a Golden Globe.

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Ryan Gosling and Robert De Niro were among the contenders for the honor.

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Downey Jr. acknowledged his difficult past and thanked his wife Susan Downey in his speech.

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He acknowledged that he was more in need of the role than it was of him.

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Downey Jr. conveyed his appreciation for the role's transformational influence.

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The Academy honored him for Oppenheimer, an outstanding performance.

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