`` The Day the Earth Stood Still '' a remake of 1951 classic . Keanu Reeves plays Klaatu , alien come to earth to tell humanity to straighten up . He is played by Sigourney Weaver
`` The Day the Earth Stood Still '' a remake of 1951 classic . Keanu Reeves plays Klaatu , alien come to earth to tell humanity to straighten up . New version suffers from preachy script , long , dull scenes .