Robert Pattinson, Kristen Stewart Dress Up, Step Out For Halloween

My No. 1 question for tonight's MTV First: Breaking Dawn - Part 2? What exactly were Robert Pattinson and Kristen Stewart supposed to be for Halloween? Like, for serious.

The "Twilight" twosome were spotted at last night's fete inside the Hollywood Forever Cemetery, where they sported a pair of creepy clear masks accented by full, bushy brows. Whatever monstrosities they were dressing as top sparkling vampires on the scary scale by, like, 500 percent.

The Hollywood Forever Cemetery has been a popular stomping ground (metaphorically of course; don't want to be stirrin' up any ghouls!) for La La Land's VIPs leading up to All Hallows' Eve. The site played host to the "Pretty Little Liars" Halloween special premiere a couple of weeks ago.

Click on the image above to see our entire gallery of celebs dressed up for Halloween!

Don't miss "MTV First: The Twilight Saga: Breaking Dawn - Part 2" on Thursday, November 1, at 8 p.m. on MTV! Kristen Stewart, Robert Pattinson and Taylor Lautner will premiere an exclusive clip from the final "Twilight" movie, followed by a lengthy interview that will continue on Submit questions for the "Twilight" trio @MTVNews, hashtag #AskTwilight.

What do you think Rob and Kristen are supposed to be dressed as? Leave your theories in the comments and on Twitter!