Steven Spielberg has had a long association with aliens. One that continues to this day, with the upcoming Disclosure Day. In 1977, his Close Encounters of the Third Kind became a massive hit.

The release of the film comes amid the release of numerous UFO files from the US government over the last few months.

Not every alien is trying to invade Earth, but if you're looking for the thrills and danger of an alien invasion, you can't go wrong with these titles.