Bertrand de Billy (born Paris, 11 January 1965) is a French conductor. He attended a Jesuit school, but only started serious musical studies when he was around 14-15; he studied piano and violin. After his career as an instrumental musician, de Billy began his conducting career in Paris. He later moved to Germany and built up his career as an opera conductor. His professional operatic conducting debut was for La Traviata in Oviedo, Spain in 1991, replacing a conductor at short notice. He was the general music director at the Anhaltisches Theater in Dessau from 1993 to 1995. At the Vienna Volksoper he held the post of first conductor from 1996 to 1998. From 1999 to 2004, de Billy was Chief Conductor of the Gran Teatre del Liceu, Barcelona, after the reopening of the theatre.