Rebecca Marder (born 10 April 1995) is a French film and stage actress.

Rebecca Marder was born on 10 April 1995 in Paris, France. Marder is the daughter of American musician Marc Marder and French journalist and theatre critic Mathilde de La Bardonnie, who worked for Le Monde and later Libération. Her father is Jewish and her mother Catholic. Marder grew up in France and is a dual citizen of France and the United States.