The Minnesota-based Lee, 18, went into the all-arounds with a medal already in her pocket, having been part of the U.S. team that won silver Tuesday.
Lee competed in the all-around competition Thursday alongside fellow American Jade Carey, who finished in eight place.
Lee and Carey's teammates, including Simone Biles, who withdrew from the individual competition to focus on her mental health, were seen Thursday in the stands in Tokyo cheering on Lee and Carey.
Simone Biles and Team USA in the stands supporting Suni Lee and Jade Carey ❤️ pic.twitter.com/fuH1JxKPqr— ESPN (@espn) July 29, 2021
Here are five things to know about Lee, America's newest gold medal-winning gymnast.
1. Lee made history as a Hmong-American:
Lee is the first Hmong-American to compete for Team USA and the first to win a gold medal at the Olympics.
One of six children, Lee was born and raised in Minnesota, a state that has one of the largest Hmong populations in the nation.
The Hmong people lived in southwestern China for thousands of years and then migrated to countries including Laos and Thailand. During the Vietnam War, the Hmong living in Laos partnered with American forces, which led to them being retaliated against once the United States left in the early 1970s.
Many families eventually resettled in the U.S., including Lee's father, John, who moved to Minnesota from Laos at the age of 7 with his 10 siblings and their parents, according to ESPN.
Lee told People magazine earlier this year that she knows making gymnastics history as a Hmong-American "means a lot to the Hmong community ... and to just be an inspiration to other Hmong people [means] a lot to me too."
2. Lee is the youngest competitor on the US gymnastics team:
Lee is the youngest person on this year's team at 18 years old, but is no stranger to high-stakes competition. A first-time Olympian, Lee is the national bar champion and has taken gold for beam at several national championships and at the 2019 World Championships.
3. Lee's family watched her compete from Minnesota:
Due to COVID-19 restrictions, Lee's family was not able to travel to Tokyo to watch her in person.
Instead, the family gathered in their home state of Minnesota to watch Lee win the gold.
Among the family members celebrating was Lee's dad, who was paralyzed from the chest down after falling from a ladder while helping a neighbor cut a tree branch in 2019. The accident took place just days before Lee competed at the U.S. National Gymnastics Championships.
It was Lee's dad who helped her get her start in gymnastics by building a wooden balance beam that still sits in the family's backyard.
"[He tells me] to go out there and do my best and to just do what I do," Lee told People about her dad's pep talks.
4. Lee survived a broken foot, family tragedy before the Olympics:
Then in June 2020 she broke her foot, and later over the summer, her aunt and uncle both contracted COVID-19 and died.
"It's been a tough year, but I'm super proud of myself," Lee told ESPN earlier this month. "After COVID and quarantine, I was unmotivated because we had so much time off and I felt I wasn't good enough anymore. But now I've been a lot better mentally and you can see it in my gymnastics."
5. Lee's next stop post-Olympics is college:
After the Olympics, Lee plans to attend Auburn University in Alabama.
ABC News' Alexandra Svokos and Aryana Azari contributed to this report.