The American became the first woman in 20 years to win back-to-back world and Olympic all around titles with a total of 62.198.
The 19-year-old who is from Texas, US, became the first woman in 20 years to win back-to-back world and Olympic all-around titles with a total of 62.198.
Gymnastics fans said Biles' all-around win is merely a confirmation that she is the best in the world, and probably the best of all time.
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Compatriot Aly Raisman claimed silver, while Russia's Aliya Mustafina settled for bronze.