Independence Day (1996)
Will Smith stars in one of the most epic alien films of all time. An alien mothership appears around earth and sends huge flying saucers to hover ominously over Earth's major cities. An attack begins and Smith leads a squadron to save the day. The aliens are pant-wettingly creepy and the scale of their spaceships is terrifying. Independence Day's White House obliteration scene is so classic that Austin Powers' Dr Evil used it to threaten the world's leaders.