The Day the Earth Stood Still

The Day the Earth Stood Still is a 2008 American science fiction film and an adaptation of the 1951 film of the same name (which itself was based on the 1940 short story "Farewell to the Master"). Directed by Scott Derrickson from a screenplay by David Scarpa, it stars Keanu Reeves as Klaatu, an alien sent to try to change human behavior in an effort to save Earth from environmental degradation; this version replaces the Cold War-era theme of nuclear warfare with the contemporary issue of negative human impact on the environment. The film co-stars Jennifer Connelly, Jaden Smith, John Cleese, Jon Hamm, and Kathy Bates.