Some movie aliens make you want to phone home. Others make you check the ceiling before going to bed. E.T. made an entire generation cry, Predator turned the jungle into a nightmare, and Stitch proved that an alien experiment could become everyone's favorite troublemaker. Then you've got the Xenomorph, the hilarious aliens from Men in Black, and a whole universe of creatures that stole their movies. But which extraterrestrial deserves the crown? The cutest? The scariest? The one you'd actually want to meet? It's time to settle the galaxy's biggest argument. Vote head-to-head and crown the greatest movie alien of all time.