Isabelle Adjani (born Isabelle Yasmina Adjani on 27 June 1955) is a French film actress and singer. She is a five-time César Award winner and two-time Academy Award nominee.

After success in the Comédie Française, Adjani gained further fame in 1975 for her lauded performance as Adele Hugo in The Story of Adele H., which earned the then 20 year-old her first Academy Award nomination for Best Actress, making her the youngest nominee ever at the time. She won the first of a record five César Awards for Best Actress for the 1981 film Possession. Her subsequent wins were for One Deadly Summer (1983), Camille Claudel (1988), La Reine Margot (1994) and Skirt Day (2009). Her 1988 Best Actress Academy Award nomination for Camille Claudel made her the first French actress to receive two nominations.