Dalilah Muhammad

Dalilah Muhammad (born February 7, 1990) is a retired American track and field athlete who competed in the 400 meters hurdles. She is the 2016 Rio Olympic champion and 2020 Tokyo Olympics silver medalist, becoming at the latter the then-second-fastest woman of all time in the event with her personal best of 51.58 seconds.

Muhammad was second at both the 2013 and 2017 World Championships before taking her first World Championship gold in 2019, setting the former world record of 52.16 s. She also won a bronze medal in 2022. She was the second female 400 m hurdler in history, after Sally Gunnell, to have won the Olympic, World titles and broken the world record. At both the 2019 World Championships and Tokyo Games, she also took gold as part of women's 4 × 400 metres relay team. In 2019, she was named the Female Athlete of the Year by World Athletics.

Muhammad won the 400 m hurdles at the 2007 World Youth Championships, and placed second in the event at the 2009 Pan American Junior Championships. Collegiately, she ran for the USC Trojans, for whom she was a four-time All-American at the NCAA Outdoor Championships. She also won the American title in 2013, 2016, 2017, 2019 and 2025 whilst also becoming the Diamond League champion in 2017 and 2018. She first broke the 400 m hurdles world record at the 2019 US Championships with a time of 52.20 s, before surpassing that time by running 52.16 s later that year.