Didier Haudepin (born 15 August 1951) is a French actor, film producer, director and screenwriter. He has appeared in 44 films and television shows, and plays since 1960. His film Those Were the Days was screened in the Un Certain Regard section at the 1995 Cannes Film Festival. He is most well known for his lead role in Les amitiés particulières, the film adaptation of the eponymous novel by Roger Peyrefitte, as Alexandre Motier.