Christian Aaron Boulogne (11 August 1962 – May 2023), also known as Ari Boulogne and Ari Päffgen, was a French photographer, actor and writer. Boulogne was born in Neuilly-sur-Seine on 11 August 1962. He was the son of German singer and actress Nico. Nico always claimed that the biological father was French actor Alain Delon, although Delon consistently denied paternity to Boulogne.