Estelle Guillet is a handisport rider of the French para-dressage team. Is participated in her first championship in North Carolina and has quickly become the 6th in the world. She began competing under the Swiss flag in 2017 before switching to compete for France in the 2018 season. She possesses dual French-Swiss citizenship.

Estelle Guillet found herself on the back of a pony at the age of 4. Her father entrusted her with a pony at age 12 and she began accompanying her grandfather for walks through the woods.

At age 16, Guillet left her family to obtain her BTS (higher technician certificate) in horse breeding. She started equestrian competitions with show jumping. On February 14, 2001, an accident during a course resulted in Guillet losing sensitivity in her right leg from the knee to her foot. All feeling in her foot was blocked.