Requiem for a Dream is a 2000 psychological drama directed by Darren Aronofsky, with a score by Clint Mansell performed by the Kronos Quartet. Its main theme, often known as Lux Aeterna, moved far beyond the film after being reused and remixed for trailers, including work promoting The Lord of the Rings. The relentless strings became shorthand online for addiction, obsession and impending collapse, and the excerpt now circulates in memes, edits and soundboards whenever creators need instant cinematic dread without using dialogue or a full song.