Casadesus was born in Paris on 7 December 1935, the son of actress
Gisèle Casadesus and her husband . He began his career as a percussionist before studying composition and conducting with
Pierre Dervaux and
Pierre Boulez. In 1969 he was hired as assistant conductor at the
Paris Opéra and the
Opéra-Comique. In 1971 he co-founded the
Orchestre National des Pays de la Loire with
Pierre Dervaux, and acted as Dervaux's deputy there until 1976. In 1976 he became principal conductor of the
Orchestre national de Lille, performing concerts locally and internationally. He directed the
French Youth Orchestra in 2007. ==Personal life==