Pierre Vassiliu (23 October 1937 in Villecresnes, France, d 17 August 2014 in Sète, France) was a French singer and songwriter.

His first record, "Armand", co-written with his brother Michel, appeared in 1962. It was an enormous success, selling 150,000 copies. This opened the doors of the Olympia in Paris to him, where he opened for the Beatles in 1964. He went on to a two-month stand with Françoise Hardy, Jacques Dutronc, and Johnny Hallyday. He had a string of hits, including "Charlotte", "Ivanhoe", and "La femme du sergent", censored because of the Algerian War. His 1973 song "Qui c'est celui-là?" was done partido alto by Chico Buarque; it sold more than 300,000 copies and secured for him a place in the memories of the teenagers of the time.