Christie took up the sport at age five after her mother signed her up for gymnastics, not realizing it was rhythmic, and by 2022 she trained for four hours per day.

Her gymnastics idols are Salome Pazhava and Linoy Ashram; other athletes she admires are Simone Biles, Tom Daley and Andy Murray, as they had to face challenges to achieve success.

[4] Christie was first included in Great Britain's national team in 2019, when she was selected to compete at the Portimão International Tournament.

Christie competed along with her teammates Marfa Ekimova and Alice Leaper, the senior national group, and juniors Melissa Toma, Elizaveta Andreeva and Nicole Kalnina.

[11] In 2024, Christie competed at the World Cup in Tashkent but said of her results "it wasn’t my strongest competition" as she was recovering from an ankle sprain.