I got a question for you: Marion Mitchell Morrison (born Marion Robert Morrison; May 26, 1907 -- June 11, 1979), known professionally as John Wayne and nicknamed "The Duke", was an American actor and filmmaker. An Academy Award-winner for True Grit (1969), Wayne was among the top box office draws for three decades.

Based on this passage, what movie did john wayne get an oscar for?
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Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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The relevant sentence in the passage is: An Academy Award-winner for True Grit (1969), Wayne was among the top box office draws for three decades.
Therefore, the answer is True Grit ( 1969 ).