E.T.: The Extra-Terrestrial, Film - 1982.  A meek and alienated little boy finds a stranded extraterrestrial. He has to find the courage to defy the authorities to help the alien return to its home planet.  Directed by Steven Spielberg.

http://youtu.be/taMnCjzKgd8  The first production depicting an alien as a nice creation as opposed to an alien.  Would you agree?