what is it's genre?
Science fiction
Close Encounters of the Third Kind
 science fiction
who wrote close encounters of the third kind Steven Spielberg is it a movie? Yes, It is an American film.
wiki:1171324
Close Encounters of the Third Kind [SEP] Introduction
Close Encounters of the Third Kind is a 1977 American science fiction film written and directed by Steven Spielberg, and starring Richard Dreyfuss, Melinda Dillon, Teri Garr, Bob Balaban, Cary Guffey, and François Truffaut. It tells the story of Roy Neary, an everyday blue-collar worker in Indiana, whose life changes after an encounter with an unidentified flying object (UFO). "Close Encounters" was a long-cherished project for Spielberg. In late 1973, he developed a deal with Columbia Pictures for a science fiction film. Though Spielberg received sole credit for the script, he was assisted by Paul Schrader, John Hill, David Giler, Hal Barwood, Matthew Robbins, and Jerry Belson, all of whom contributed to the screenplay in varying degrees.