Léon Bakst (Russian: ???? (???) ?????????? ?????, Leon (Lev) Nikolaevich Bakst) – born as Leyb-Khaim Izrailevich (later Samoylovich) Rosenberg, ????-???? ?????????? (??????????) ????????? (27 January (8 February) 1866 – 28 December 1924) was a Russian painter and scene and costume designer.
He was a member of the Sergei Diaghilev circle and the Ballets Russes, for which he designed exotic, richly coloured sets and costumes.