Are you ready to party, Pretty Little Liars fans? Before you answer, consider the location:

A graveyard.

Indeed, that's where Aria, Hanna, Emily and Spencer find themselves on Tuesday's aptly-titled "Grave New World," the show's annual Halloween special that will lead into the series premiere of Ravenswood.

Check out these young ladies in some pretty cool outfits via the following sneak peek and listen to Hanna crack wise like only she can:

And then watch Hanna on the run! From whom? It will become a lot more clear this Tuesday:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.