It’s time to get ready for Rio.

Serena Williams

Username: SerenaUnmatched
Olympic sport: Tennis

Clive Brunskill / Getty Images

Gabby Douglas

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Olympic sport: Gymnastics

Ezra Shaw / Getty Images

Simone Biles

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Olympic sport: Gymnastics

Ezra Shaw / Getty Images

Sam Mikulak

Username: samuelmikulak
Olympic sport: Gymnastics

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