Rebecca Dayan ([da.jɔn]; born 1984) is a French actress, model, artist, and activist. After training in fine arts, Dayan began her career in fashion and theatre in Paris. She then moved to New York City where she took up screen acting. Following several small roles, she returned to painting, and had her first large role in 2017 film Novitiate. She is best known for portraying Elsa Peretti in the 2021 Netflix miniseries Halston.