After joining the Comédie-Française on September 1, 1971, Catherine Ferran was named a sociétaire on January 1, 1981, and a sociétaire honoraire on January 1, 2006.

She played the roles of the Mother in Jean-Luc Lagarce’s Just the End of the World (Juste la fin du monde) staged by Michel Raskine, of Cathos in Molière’s Les Précieuses ridicules (The Precious Ridiculous) staged by Dan Jemmet; of Charlotte in Édouard Bourdet's Les Temps difficiles staged by Jean-Claude Berutti, of Madame Queuleu in Bernard-Marie Koltès’ Return to the Desert (Retour au désert) staged by Muriel Mayette-Holtz, and of the Policewoman, the Lady with a little voice, the Lady with a shell in Philippe Minyana’s La Maison des morts staged by Robert Cantarella.
Furthermore, Catherine Ferrand embodied the roles of First Woman, First Neighbor and Maria in Thomas Bernhard's Dramalettes staged par Muriel Mayette-Holtz, of Anna in Thomas Bernhard’s Heldenplatz put on stage by Arthur Nauzyciel, of Emilia in William Shakespeare’s The Winter Tale staged by Muriel Mayette-Holtz, of Nérine in Molière’s Monsieur de Pourceaugnac staged by Philippe Adrien, of a Duenna in Victor Hugo’s Ruy Blas put on stage by Brigitte Jaques-Wajeman, of Rita in Karin Mainwaring’s The Rain Dancers staged by Muriel Mayette-Holtz and Jacques Vincey, as well as the role of Jacqueline in Marie Laberge’s Oublier staged by Daniel Benoin.