Born on January 19, 1928, in Dol‑de‑Bretagne, Robert Deslandes grew up in Brittany before moving to Paris, where he developed an early passion for the theatre. After working at Citroën and completing his military service, he decided to train seriously as an actor by studying under Henri Bosc. From the 1950s onward, he multiplied stage experiences, performing in operettas, comedies, and dramas while also working as a stage manager and assistant director. His theatrical career led him to collaborate with major figures such as Jean Anouilh, Marcel Aymé, Pierre Mondy, and François Périer, with whom he formed a lasting friendship. In cinema, he appeared in many popular films from the 1960s to the 1980s, including Weekend at Zuydcoote, The Sunday of Life, Le Bar du téléphone, and The Man with Silver Eyes, often in discreet yet solid supporting roles. He also acted in nearly thirty television films and series, including several historical productions.