Sydney Michelle McLaughlin-Levrone (mə-GLOK-lin-lə-VROH-nee; née McLaughlin; born August 7, 1999) is an American hurdler and sprinter who competes in the 400 meters hurdles and is the world record holder in that event. She is the 2020 Tokyo Olympics and 2024 Paris Olympics champion with the World and Olympic record, and 2022 World champion. She set a world record time of 50.37 seconds at the Paris Olympics on August 8, 2024, breaking her own old world record of 50.65 seconds. She is the first track athlete to break four world records in the same event: setting four world records during 13 months, she was the first woman to break the 52-second (June 2021) and 51-second (July 2022) barriers in the 400 m hurdles. She won the silver medal at the 2019 World Championships. At all three competitions, she also took gold as part of a women's 4 × 400 m relay team.