Another Earth is a 2011 American science fiction drama film directed by Mike Cahill and starring Brit Marling, William Mapother, and Robin Lord Taylor.

It premiered at the 2011 Sundance Film Festival in January, and was given a limited theatrical release on July 22, 2011, by Fox Searchlight Pictures.

Rhoda Williams, a brilliant 17-year-old girl who has spent her young life fascinated by astronomy, is delighted to learn that she has been accepted into MIT.

Listening to a story on the radio about a recently discovered Earth-like planet, she gazes out her car window at the stars and inadvertently hits a stopped car at an intersection, putting John Burroughs in a coma and killing his pregnant wife and young son.

After serving her four-year prison sentence, Rhoda becomes a janitor at her former high school and struggles with guilt and regret.

John, who has dropped out of his Yale music faculty position, has been letting his home and himself go, and accepts Rhoda's offer.

The idea behind Another Earth first developed out of director Mike Cahill and actress Brit Marling speculating as to what it would be like were one to encounter one's own self.

The visual representation of the duplicate planet was deliberately made to evoke the Moon, as Cahill was deeply inspired by the 1969 Apollo 11 lunar landing.

The scene of the car collision was made possible through the help of a local police officer with whom Cahill was acquainted, who cordoned off part of a highway late one night.

Variety reported: "[It] has been deemed one of the more highly praised pics of the fest as it received a standing ovation after the screening and strong word of mouth from buyers and festgoers."

[15] Another Earth won the Alfred P. Sloan Prize at the 2011 Sundance Film Festival, for "focusing on science or technology as a theme, or depicting a scientist, engineer or mathematician as a major character.