达利拉·穆罕默德，Dalilah Muhammad is an American track and field athlete who specializes in the 400 meters hurdles. A 2016 Rio Olympics champion and 2020 Tokyo Olympics silver medalist, she won a gold medal at the 2019 World Championships, setting the former world record with a time of 52.16 seconds. Muhammad is only the second female 400 m hurdler in history, after Sally Gunnell, to have won the Olympic, World titles and broken the world record. In 2019, she added a gold in the 4×400 m relay, having won silver medals in her signature event at the 2013 and 2017 World Championships.