Hannah Beachler made history as she became the first black person to win the Oscar for production design, for her work on Black Panther with Jay Hart.
She thanked director Ryan Coogler for giving her "a safe space" and "brotherhood", and she had a message for the next generation.
"I give this strength to all of those who come next, to keep going, to never give up," she said.
"And when you think it's impossible, just remember to say this piece of advice I got from a very wise woman: I did my best, and my best is good enough."
Fellow Black Panther crew member Ruth E Carter also made history for being the first black person to win an Oscar for best costume.
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