Catherine Jacob is a French film and theatrical actress who has won a César Award for her role in Life Is a Long Quiet River (1988), and was nominated for Best Supporting Actress in Tatie Danielle (1990), Merci la vie (1991) and Neuf mois (1994). She has been two-time president of the Lumières Award. She is known for her voice and her charisma.

The César Award for Best Actress in a Supporting Role is one of the César Awards, presented annually by the Académie des Arts et Techniques du Cinéma to recognize the outstanding performance in a supporting role of an actress who has worked within the French film industry during the year preceding the ceremony. Nominees and winner are selected via a run-off voting by all the members of the Académie.