Anaïs Aude Marie Michèle Demoustier (born 29 September 1987) is a French actress. She was nominated for Most Promising Actress twice at the César Awards, in 2009 for Les Grandes Personnes and in 2011 for Living on Love Alone. In 2020, she won the César for Best Actress for her performance in the film Alice and the Mayor.

In April 2023, Demoustier was announced as the president of the Caméra d'Or Jury for the 2023 Cannes Film Festival.