Allyson Felix claimed her first Olympic medal at the age of 18 at the 2004 Athens Olympics, winning silver in the 200-meter. Since then, the four-time Olympian has won six Olympic medals. On Monday night, Felix will race a talented field in the 400 meters in Rio as she aims for her second individual gold medal and fifth gold medal overall.
The 30-year-old U.S. sprinter, who is the 2015 400-meter world champion, is running the individual 400-meter final for the first time in her Olympic career.
Felix, who is arguably one of the most impressive athletes of the decade, has won more world championship gold medals than any other U.S. track and field athlete. In addition to her Olympic medals, she holds 19 medals from international competition. Click through the gallery to see, and learn more about Felix's family. (Instagram)