25 familiar faces you’ll see in Rio

Adrian medaled three times in London, including two gold medals for Team USA. He also won gold in the 4x100 meter freestyle in Beijing. He will be participating in the 100 meter freestyle again to defend his gold.

Bolt has six gold medals over the last two Olympic Games, and holds the world records in the 100 meter and 200 meter sprints. He will attempt to win three gold medals for the third consecutive Olympics.

Boudia won gold in the 10 meter platform and bronze in the 10 meter synchro dive at the London Games. He hopes to medal again four years later.

The Bryan brothers are looking to medal in men's doubles tennis for the third time. They won bronze in 2008 and gold in 2012.

Burroughs remains of USA's best hopes for gold in wrestling. He won gold in the 74 kg weight class in London.

Douglas won gold medals in the all-around and team competitions in London. While Simone Biles has stolen some of the thunder on the women's team, Douglas is still one of the world's elite gymnasts.

Durant leads Team USA again as the most high profile NBA player on Team USA basketball. He's made plenty of news recently after signing with the Golden State Warriors.

Eaton won gold in the decathlon in London for Team USA, and is the frontrunner to win gold in Rio.

Felix has won six medals in her Olympic career over the last three games. At age 30, Rio could be her last chance to add onto her medal tally. She's trying to defend his 200 meter gold from London.

Franklin was one of the breakout faces of the London games after winning five medals, including four gold medals, for Team USA. She remains an elite competitor in the backstroke.

Ledecky won gold in the 800 meter freestyle in London at age 15, and is looking to add more gold medals to her name after winning five gold medals at the World Championships.

Over the last three Olympic Games, Lochte has earned 11 medals. He won five medals in London and will try to add onto his tally at age 32.

Murray won gold for Great Britain in men's individual tennis in 2012. He will compete for another medal in Rio.

Parker leads Team USA in her third Olympics. The WNBA star won gold in Beijing and London.

Phelps could be set to cap off the greatest career ever by an Olympian. He already has 22 medals, including 18 gold medals, and will be swimming in up to six events in Rio.

One of the greatest female divers ever, Chen Ruolin has won four gold medals over the last two Olympics Games for China. She will be participating in the 10 meter and 10 meter synchro again at age 23.

Raisman returns to Team USA after winning three medals in London. She's one part of what's expected to be a dominant women's gymnastics team.

Reese won gold in the long jump in London. Most recently, she won gold in the 2016 World Indoor Championships.

Schmitt claimed five medals in London, and also won a bronze medal in Beijing. She will be participating in the 400 meter and 800 meter freestyle in Rio.

Shields is the reigning middleweight boxing gold medalist following the London Games. She will defend her title in Rio.

Solo is one of three women making her third appearance for Team USA at the Olympics. Team USA is hoping to win their fourth consecutive gold medal.

Uchimura won gold in the men's all-around in London, and also has four silver medals over the last two Olympic Games for Japan.

Varner won gold in the 96 kg weight division at the London Games for Team USA. He's returning to compete in Rio.

Vollmer won three gold medals in London after winning one gold back in 2004. She will be competing in multiple events in the Rio Games, including the 400 meter freestyle relay for Team USA.

Williams is the arguably the best women's tennis player ever, and is looking to defend her gold medal in singles tennis from the London Games.