Stéphane Rideau (born July 25, 1976) is a French actor born near Agen. Although he intended to pursue a career in sports, in 1992 he was spotted at a rugby game, after which he auditioned for a role in André Téchiné's film Wild Reeds. At the time he was sixteen years old.

He later played the role of a gay teenager in director Sébastien Lifshitz's film Come Undone. Rideau has extensive acting experience, including the films Far, The Belly of Juliette, The Clan, and Helen's Gift. He currently lives with his girlfriend Célia and daughter.