Simone Biles hasn't won an Olympic medal - but she's already been hailed as the best gymnast in the world.
Biles, 19, has been tearing up the gymnastics world since she emerged onto the international competition circuit in 2013. Now, with the women's gymnastics Olympic trials starting on July 8, Biles is expected to easily snag a spot on the US team - and she's also the favorite to win the all-around gold once the games finally begin.
Here's the story of her rise to top: