Called the world's fastest woman, helped the US track team win the 4x100 meter relay in a world-best 41.82 seconds.
Allyson Felix's second leg of the race helped the USA women gain ground, while 100-meter world champion Tori Bowie clinched the victory on a strong anchor leg. It was the British quartet, in front of their home crowd, who took the silver medal in a time of 42.12 seconds. Trinidad and Tobago finished in sixth place, with Brazil in seventh place and the Netherlands in eighth place.
However, she looked in no discomfort as she surged down the final straight to win in 41.82 seconds.
Bowie was shadowed all the way to the line by Briton Daryll Neita who led her team to silver, in 42.12, ahead of 2015 champions Jamaica who were missing their usual anchor runner in Shelly-Ann Fraser-Pryce.
Felix's gold takes her to the all-time leader in terms of world medals - one ahead of Jamaican duo Merlene Ottey and Usain Bolt. Meanwhile, Ariana Washington will also receive a medal after replacing Bowie in the heats earlier on.