Isabelle Anne Madeleine Huppert (French pronunciation: ​[izabɛl yˈpɛʁ]; born 16 March 1953) is a French actress of stage and screen who has appeared in more than 90 film and television productions since 1971. She is the most nominated actress for the César Award, with 14 nominations.

Huppert began her career on stage and appeared in her first film in 1972. She received her first César Award nomination for the 1975 film Aloïse. She won the BAFTA Award for Most Promising Newcomer for the 1977 film The Lacemaker and the César Award for Best Actress for the 1995 film La Cérémonie. She has also twice won Best Actress at both the Cannes Film Festival and the Venice Film Festival. At Cannes, she won for Violette Noziere (1978) and La Pianiste (2001), while at Venice, she won for Story of Women (1988) and La Cérémonie (1995). Her other films include Loulou (1980), La Séparation (1994), 8 Women (2002), Gabrielle (2005) and Amour (2012). She has also done some English-language film projects such as Michael Cimino's Heaven's Gate (1980), David O. Russell's I Heart Huckabees (2004) and Ned Benson's The Disappearance of Eleanor Rigby (2013).