György Sándor Ligeti (28 May 1923 – 12 June 2006) was a composer from Hungary. He was an important composer of avant-garde music. His music influenced many other composers. Some of his most famous works are an opera called "Le Grand Macabre", a piece for orchestra called "Atmosphères", a piece for choirs called "Lux Aeterna", and a Requiem. Stanley Kubrick used parts of "Atmosphères", "Lux Aeterna", and the Requiem for the soundtrack of his movie "". Many other movies use pieces of Ligeti's music on their soundtracks.