It may be Robert Pattinson's birthday, but the only vampire we're checking out today is Colin Farrell in the new "Fright Night" trailer!

Farrell is the latest celeb to don fangs in the remake of the 1985 horror comedy of the same name -- where he plays Toni Collette and Anton Yelchin's bite-happy neighbor.

Christopher "McLovin" Mintz-Plasse and Imogen Poots also stars in the flick, which opens August 19th.