Clint Mansell Requiem for a Dream (Clint Mansell "Requiem for a Dream") The composer of the soundtrack is Clint Mansell , Who recorded with a string orchestra Kronos Quartet . Arrangement for string quartet was composed by David Lang, owner of the Pulitzer Prize . . The soundtrack was warmly received, and was later used in a different way in the trailers of other films and TV series "Requiem for a Dream" ( eng. Requiem for a Dream ) - American feature film directed by Darren Aronofsky by on the novel Hubert Selby Jr. , " Requiem for a Dream . " Actors - Jared Leto , Jennifer Connelly , Marlon Wayans and Ellen Burstyn , Who in 2001 was nominated for the " Oscar "In the category" Best Actress "for her work in this film. Requiem for a Dream is the soundtrack album of the film in 2000 Requiem for a Dream . It was composed by Clint Mansell and Performed by Kronos Quartet . The film's music is known for its minimalist qualities that uses constant. harmonies, a firm pulse, and Often varying musical phrases to drive the point Best Soundtrack is known for the song " Lux Aeterna "Which Also Appeared in the Trailer for The Lord of the Rings: The Two Towers , Reorganized and re-orchestrated.