Millicent (Milly) Tanner (born 10 January 1999) is a retired English international track cyclist.
Tanner attended Millfield School.
Tanner became a British team champion after winning the team sprint Championship at the 2020 British National Track Championships with Blaine Ridge-Davis. She had previously finished second in 2019.
In 2021, Tanner won team sprint bronze at the UCI Track World Championships in Roubaix, France.
At the 2023 British Cycling National Track Championships she won her second national title, after winning the team sprint again. The following year in 2024, she won a third team sprint title, at the 2024 British Cycling National Track Championships.