Marie Laure Viole Bellon, generally known as Loleh Bellon, (1925–1999) was a French stage and film actress as well as a playwright. In 1949, for her role in Robert Desnos' La Place de l'Étoile, she was awarded the Prix des Jeunes comédiens. She is remembered for her performances in Giraudoux' Judith and in Claudel's L'Annonce faite à Marie. Bellon was also a successful playwright, especially with Dames du jeudi (1976), Une absence (1988) and La Chambre d'amis (1995). For her play L'Éloignement (1987), she was awarded the Molière prize.

Born on 14 May 1925 in Bayonne, Marie Laure Viole Bellon was the daughter of Jacques Bellon, a magistrate, and Denise Simone Hulmann, a well-known photographer. In 1947, she married the Spanish writer Jorge Semprún Maura (1923–2011), with whom she gave birth to Jaime Semprún (1947–2010), also a writer. Following a divorce in 1960, she married the poet Claude Roy (1915–1997) in 1962. Loleh Bellon was the younger sister of the film director and screenwriter Yannick Bellon.