Composer of the soundtrack Clint Mansell has worked very closely with Darren Aronofsky throughout his movie career.

Aronofsky and Mansell both grew up listening to Hip hop which they based a lot of their decision making on that type of music.

"[2] The soundtrack has been widely praised, and in particular the track "Lux Aeterna" (which itself is much used in the film) has subsequently been used in various forms of media.

The theme has been featured in trailers for other films, including Babylon A.D.,[4] The Da Vinci Code,[5] I Am Legend,[6] Sunshine,[7] and Valley of Flowers.

The members were David Harrington and John Sherba, violins; Hank Dutt, viola; and Joan Jeanrenaud, cello.

"[14] The novel Requiem for a Dream was written by Hubert Selby Jr. who was inspired to write it when he lived in LA.

Hubert's life was very unfortunate; at the age of 18, he was a merchant seaman during World War II.

One night, his wife woke up from a dream about two spirits that had opened the door in their room; she says that she could tell that they were male and female.