The Amusements of Private Life(1990)

Italian-French costume dramedy that takes place in France in the end of 18th Century during the French Revolution. It is "The Marriage of Figaro" meets "The Dangerous Liaisons" and it tells the story of two women, Mathilde Seurat, the actress and Julie Renard, the aristocratic wife and a mother (Delphine Forest plays both) with the same face who came from the different parts of society and at one point exchanged their identities and their lives. The movie also features Giancarlo Giannini and great Vittorio Gassman.