Timothée Hal Chalamet was born in Manhattan, to Nicole Flender, a real estate broker and dancer, and Marc Chalamet, a UNICEF editor. His mother, who is from New York, is Jewish, of Russian Jewish and Austrian Jewish descent. His father, who is from Nîmes, France, is of French and English ancestry. He is the brother of actress Pauline Chalamet, a nephew of director Rodman Flender, and a grandson of screenwriter Harold Flender.