André Isaac (August 15, 1893-February 9, 1975), better known as Pierre Dac was a French humorist and Résistance activist. He was born in Châlons-sur-Marne, France. During the German occupation of France in World War II, Pierre Dac was one of the speakers of Radio Londres. After the war, he became famous for zany, borderline absurd radio plays and stand-up comedy, along with Francis Blanche.