On 30 July 2019, Millot signed his first professional contract with Monaco.[2] Millot made his professional debut with Monaco in a 1–0 Ligue 1 loss to Brest on 4 October 2020.[3]
VfB Stuttgart
On 14 August 2021, Millot signed a four-year-contract with VfB Stuttgart.[4] On 5 April 2023, he scored his first ever goal for VfB Stuttgart against 1. FC Nürnbergin quarter-finals DFB-Pokal.
On 12 January 2024, Millot extended his contract with VfB Stuttgart until June 2028
