Mathilde Gremaud (born 8 February 2000) is an Olympic Swiss freestyle skier and eight time X Games medalist.

On February 28, 2023, she became the first freestyle skier to hold both slopestyle World and Olympic Champion titles after winning gold in both events.

She competed at the FIS Freestyle Ski and Snowboarding World Championships 2021, winning a silver medal in Slopestyle.

[6][7] Torniainen would later coach China's Eileen Gu for the 2022 Winter Olympics.

[8] In 2020, Gremaud became the first woman to land a switch double cork 1440 in competition history.