From 1952 to 1959, he lived with Simone de Beauvoir. In 1963 he married French actress Judith Magre. They divorced in 1971, and he later married Angelika Schrobsdorff, a German-Jewish writer. He divorced a second time, and was the father of Angélique Lanzmann and Félix Lanzmann. Claude Lanzmann died on 5 July 2018 at his Paris home, after having been ill for several days. He was 92.
