Requiem for a Dream is a 2000 drama film directed by Darren Aronofsky and starring Ellen Burstyn, Jared Leto, Jennifer Connelly, and Marlon Wayans. The film is based on the novel of the same name by Hubert Selby, Jr., with whom Aronofsky wrote the screenplay.

This gritty drama concerns four people trapped by their addictions. Harry (Jared Leto), and his best friend Tyrone (Marlon Wayans) are impoverished heroin addicts living in Coney Island, NY, while Harry's girlfriend Marion (Jennifer Connelly) is a fellow addict trying to distance herself from her wealthy father. Harry dreams of scoring a pound of smack, from which he could make enough money to open a clothing boutique with Marion, but so far he and his friends can barely scrape by supporting their own habits. Meanwhile, Harry's mother Sara (Ellen Burstyn), who spends her days watching television, is told she has the opportunity to appear on her favorite game show; wanting to lose enough weight to fit into her favorite red dress, she visits a sleazy doctor who gives her a prescription for amphetamines. Soon Sara has a drug habit of her own that is spiraling out of control.

Requiem for a Dream was directed by Darren Aronofsky, who also co-wrote the screenplay with Selby; it was Aronofsky's second feature, following his acclaimed independent film Pi.

The majority of reviewers characterized Requiem for a Dream in the genre of "drug movies", along with films like The Basketball Diaries, Trainspotting, Spun, and Fear and Loathing in Las Vegas. However, Aronofsky has said: "Requiem for a Dream is not about heroin or about drugs… The Harry-Tyrone-Marion story is a very traditional heroin story. But putting it side by side with the Sara story, we suddenly say, 'Oh, my God, what is a drug?' The idea that the same inner monologue goes through a person's head when they're trying to quit drugs, as with cigarettes, as when they're trying to not eat food so they can lose 20 pounds, was really fascinating to me. I thought it was an idea that we hadn't seen on film and I wanted to bring it up on the screen. "

The film received a largely positive response from critics, with the film aggregator website, Rotten Tomatoes, giving the film a 78% "Certified Fresh" rating, with the camera work and the individual performances particularly praised. Film critic James Berardinelli considered Requiem for a Dream the second best film of the decade, behind the Lord of the Rings film trilogy.

Ellen Burstyn was nominated for an Academy Award for Best Actress for her role as Sara Goldfarb. She was nominated for several other awards including the Golden Globe Award for Best Actress - Motion Picture Drama and the Screen Actors Guild Award for Outstanding Performance by a Female Actor in a Leading Role.