Which 1977 Steven Spielberg film dealt with first contact with aliens?

The 1977 Steven Spielberg film about first contact with aliens is Close Encounters of the Third Kind.

The science-fiction drama follows Roy Neary, an ordinary Indiana electrical lineman whose life changes after he encounters an unidentified flying object. At the same time, scientists and government officials investigate strange events around the world, while a mother searches for her young son after an extraordinary UFO manifestation.

The title comes from astronomer and ufologist J. Allen Hynek’s classification system. A “third kind” encounter involves observing extraterrestrial beings, making the title more specific than a general UFO sighting. The film’s climactic communication between humans and visitors uses a five-note musical sequence composed by John Williams.

Close Encounters is often mixed up with E.T. the Extra-Terrestrial, another Spielberg film involving friendly extraterrestrial contact. E.T. centers on a stranded alien and a child, whereas Close Encounters focuses on humanity’s first organized encounter with visitors and the mystery surrounding their arrival.