I came across this poster for "Let The Right One In", and loved it. It's by an artist named Tyler Stout, who seems to do a few of these kind of things. I've seen some of his past stuff, and particularly liked his "Iron Man 2" poster, so I've posted a few here for you to peruse if you like.
Visit his website.It's worth clicking on even just for the cool little flash(?) animation on the opening page.
Let The Right One In
Iron Man 2
The Flight Of The Conchords