Aliens have long held a place in the heart of cinema. Invading the sci-fi, horror, and comedy genres, they have been appearing on screens since before special effects could really do them justice.
Sometimes they are goofy portrayals of green monsters, and sometimes they're realistic AI creations that make you sleep with the lights on.
So, whether you want some spoofy alien fun or Oscar-nominated genius, click on for a list of the best alien films out there (in space).