Nathan Adrian is an American swimmer and three-time Olympic gold medalist. At the London Games in 2012, he won two gold medals and one silver.
Veronica Campbell-Brown is the youngest Jamaican woman to win an Olympic medal. At the 2012 Olympic Games, she became a six-time Olympic medalist.
Swimmer Natalie Coughlin has won more than 10 Olympic medals in her career, including two gold medals at the 2004 Olympics in Athens.
At the Summer Games in London, Ashton Eaton—the youngest to member of the U.S. decathlon team that year, at age 24—took home the decathlon gold medal.
British track and field star Jessica Ennis won a gold medal in the heptathlon at the 2012 Summer Olympics in London.
Paraguayan model and javelin thrower Leryn Franco received wide fame after competing in the 2008 Summer Olympics in Beijing, China, but not for her athleticism alone—her good looks are equally, if not more, responsible for her mass appeal.
Justin Gatlin sprinted to fame by setting a world record in the 100-meter race. Months later, he tested positive for a banned substance and was suspended. Gatlin is slated to make a comeback at the 2012 Summer Olympics.
Mia Hamm is a former American soccer player who has scored more international goals than any other player, male or female.
One of the most beloved athletes of the 1970s, track athlete Bruce Jenner won a gold medal and set a world record in the decathlon at the 1976 Summer Olympics. Since then, he's appeared on the popular reality show Keeping Up with the Kardashians.
Track star Lolo Jones has won both USA and World championships in hurdle events, and is a member of the 2012 Olympic team.
Anastasia Valeryevna Liukin, better known as Nastia Liukin, is a world-renowned gymnast and Olympian who was named the Olympic individual all-around Champion in 2008.
Ryan Lochte is an American swimmer who has won 11 Olympic medals in the sport, including five golds.
American diving champion Greg Louganis won 13 world championships and made history at the 1982 Olympics as the first diver ever awarded a perfect score.
Misty May-Treanor is a professional beach volleyball player and three-time Olympic gold medalist. She is the longtime competitive partner of Kerri Walsh-Jennings.
Spanish-born Rafael Nadal is widely regarded as one of the greatest professional tennis players of all time, completing the career Grand Slam by age 24, the youngest in history to achieve the feat.
Swimmer Michael Phelps has set the record for winning the most medals, 22, of any Olympic athlete in history.
American track star Sanya Richards-Ross won Olympic gold in 2004 and 2008, as part of the U.S. 400-meter relay team, and went on to win gold in the women's 400 meters in 2012.
Olympic gymnast Alicia Sacramone has won dozens of World Championship and U.S. National Championship medals—competing with such teammates as Nastia Liukin and Shawn Johnson—and won a silver medal at the 2008 Summer Olympics.
Maria Sharapova has won various honors throughout her career, including the 2012 French Open and a silver medal in women's singles at the 2012 Olympics.
Goalkeeper Hope Solo helped the U.S. Women's Soccer Team win gold medals at the 2008 and 2012 Olympic Games. She also appeared on Dancing with the Stars in 2011.
British swimmer Liam Tancock is a world record holder in the 50-meter and 100-meter backstroke events.
Australian Olympic swimmer Ian Thorpe won the most gold medals of any Australian athlete, and was the youngest to win a world championship. He went on to win 10 more.
Dara Torres is an American swimmer who has taken home 12 Olympic medals and will seek more at the age of 45 in the 2012 Summer Olympic Games in London.
Kerri Walsh-Jennings is a professional beach volleyball player and three-time Olympic gold medalist. She is the longtime competitive partner of Misty May-Treanor.
American professional tennis player Serena Williams has won 27 Grand Slam titles, including five Wimbledon and five Australian Open championships, and several Olympic gold medals.
Danish tennis player Caroline Wozniacki has been ranked No. 1 on the WTA Tour, and is the youngest singles player worldwide to be ranked in the top 10.