Claude Berri
Langmann was born in Paris, France, the son of Anne-Marie Rassam and film director Claude Berri. His uncle was the late producer Jean-Pierre Rassam and his brother was the late French actor Julien Rassam. Both his mother and his brother committed suicide, in 1997 and in 2002, respectively, while his father died of a stroke in 2009. He has a younger half-brother from his father's later relationship, Darius Langmann. His father Claude Berri was Jewish, and his mother Anne-Marie Rassam, who was born in Lebanon, was Lebanese Christian.