Trintignant was born in Piolenc, Vaucluse, France, the son of Claire (née Tourtin) and Raoul Trintignant, an industrialist. At the age of twenty, Trintignant moved to Paris to study drama, and made his theatrical debut in 1951 going on to be seen as one of the most gifted French actors of the post-war era. After touring in the early 1950s in several theater productions, his first motion picture appearance came in 1955 and the following year he gained stardom with his performance opposite Brigitte Bardot in Roger Vadim's And God Created Woman.