Millie Couzens (born 29 October 2003) is a British professional cyclist who currently rides for UCI Women's WorldTeam at road and cyclo-cross races.
Couzens was born in Banbury in Oxfordshire. She began cycle racing with Bicester Millennium Cycling Club, and won the U11 individual title at the British Schools National Cycle Championships in 2015 while a pupil at Bure Park Primary School in Bicester. She moved on to The Bicester School for her secondary education.
Couzens first found success in cyclo-cross, winning the under-16 race at the British National Cyclo-cross Championships in 2018 at the age of 14 and the junior (under-19) race in 2020, when she also took fourth place in the junior race at the World Championships.
She joined the British Cycling track team as a junior, taking three gold medals at the 2021 European Track Championships, in the omnium, the Madison (with Zoe Bäckstedt) and the team pursuit (with Bäckstedt, Grace Lister and Madelaine Leech).
Couzens also found success on the road as a junior, winning the British National Road Race Championships in 2021.
In 2021, she was recruited by Belgian cycling team owners Christoph and Philip Roodhooft to ride professionally with their IKOâÂÂCrelan cyclo-cross team and PlanturâÂÂPura road team (now named ). She won her first elite UCI cyclocross race at Cyclopark in Gravesend, Kent in December.
In May 2025, she took second place behind Mischa Bredewold in a bunch sprint on Stage 1 of the 2025 Itzulia Women. A few weeks later at the Tour of Britain Women, she finished tenth in the general classification and second in the young rider classification, riding for the Great Britain national team. In June 2025, she won the under-23 category at the British National Time Trial Championships by 50 seconds.
At the 2026 European Championships in Konya, Couzens was part of the British team pursuit line-up who set a new world record en route to the gold medal. The team consisting of Couzens, Katie Archibald, Anna Morris and Josie Knight also set a new world record of 4:02.808 in the final against Germany. She also won a bronze medal in the individual pursuit.