Willcox started in Ruka in December 2016 for the first time in the European Cup and finished 25th and 23rd. In November 2018 she achieved her first podium finish in the European Cup with second place. She made her debut in the Freestyle Skiing World Cup in January 2019 in Lake Placid , which she finished in 23rd place. In the 2019/20 season she won two European Cup victories in Airolo and achieved her first podium finish in the World Cup with third place at the Deer Valley Resort . She finished seventh in the Aerials World Cup and second in the Aerials discipline of the European Cup.