Catherine Lachens (born on September 2, 1945 in Boulogne-Billancourt (France) and died on September 27, 2023 in Paris), was a French actress with a flamboyant temperament, known for her glibness, husky voice and boundless energy.

From a modest background, she worked in a variety of odd jobs before making her film debut in 1973 in Nina Companeez's L'Histoire très bonne et très joyeuse de Colinot trousse-chemise, alongside Brigitte Bardot. She went on to play a series of roles in popular comedies, working with directors such as Georges Lautner (Flic ou voyou, Mort d'un pourri), Philippe de Broca, Claude Zidi and Jean Yanne. She plays a variety of characters, from the big-hearted prostitute to the eccentric bourgeoise, from the school principal to the passionate teacher.