Oscar Lesage (born October 23, 1996) is a French actor, director, and writer who gained international recognition for his role as Chartres in the BBC and PBS series Marie Antoinette. 

Born in Mulhouse, Haut-Rhin, France, Lesage began his performing arts training with dance instruction before transitioning to acting, starting with small commercials and roles in short videos. He gradually established himself in the industry through various film and television projects.