This 19-year-old is the best gymnast in history - here's how she rose to the top

AP/Maddie Meyer

Simone Biles competes on the balance beam at the Women's 2016 Secret US Classic.

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: