Hockey player Marissa Brandt and freestyle skier Jackie Kling were both adopted from South Korea to the U.S. at a young age.
The International Olympic Committee requires an athlete to be a "national" of the country the athlete represents.
After a 9th place finish in Sochi, Alex and Maia Shibutani have claimed bronze in PyeongChang.
Chen finished 5th overall in the men's figure skating final at the 2018 Winter Olympics.
Jong Jin Kim, who moved to the United States from South Korea in 1982, won over spectators around the world with his charming signs and irrepressible pride.
Chloe Kim told Lester Holt that she was going to treat herself to something sugary after nailing the snowboarding halfpipe at her first Olympics.
Chloe Kim started snowboarding when her father decided he wanted to learn - and by age 5, he says she was already better than him.
Kristi Yamaguchi and Michelle Kwan have been called "heroes" by many of Team USA's figure skating stars.
Nathan Chen is expected to compete at the 2018 PyeongChang Winter Olympics wearing a costume by Vera Wang, who has also made costumes for other Olympians.
From speed and figure skating to snowboarding, these athletes will be competing for Team USA at the Winter Olympics in PyeongChang.
Hannah Brandt will be competing for Team USA at the Pyeongchang games, while her older sister, Marissa Brandt will be competing for South Korea.
Jim Paek, the first Korean player to have their name engraved on the Stanley Cup, is building South Korea's hockey program ahead of the 2018 Olympics.
In January, Langland become the first female snowboarder to land a "cab 1080 double cork" in the big air event, earning herself an X Games gold medal.
Chen is currently preparing for her first World Figure Skating Championship to be held in Helsinki March 29 through April 2.
Chen is a four-time U.S. national champion and the current top U.S. scorer in international figure skating competition history.
Kim is the first woman under age 16 to win three X-Games gold medals and the first U.S. female snowboarder to win gold at the Youth Olympics.
The Shibutanis' free skate performance to Coldplay's "Fix You" helped catapult them to first place at Saturday's U.S. Figure Skating Championships.