Some stories are written and some films are made for all times. The Day the Earth Stood Still is one of them. The film is based on the story:
The Day the Earth Stood Still (a.k.a. Farewell to the Master and Journey to the World) is a 1951 American black-and-white science fiction film released by 20th Century Fox and produced by Julian Blaustein. Directed by Robert Wise, it stars Michael Rennie, Patricia Neal, Billy Gray, Hugh Marlowe, and Sam Jaffe. The screenplay was written by Edmund H. North, based on the 1940 science fiction short story "Farewell to the Master" by Harry Bates. The score was composed by Bernard Herrmann.
In The Day the Earth Stood Still, a humanoid alien visitor named Klaatu comes to Earth, accompanied by a powerful eight-foot tall robot, Gort, to deliver an important message that will affect the entire human race.