At least Robert Pattinson and Taylor Lautner take it off.
Unfortunately, however, the rest of the New Mooners won't be showing any moons nudity.
Caius himself, Jamie Campbell Bower, told MTV at Comic-Con that he and the rest of the Volturi clan—including Michael Sheen and Christopher Hayerdahl as Aro and Marcus, respectively—shot a top secret scene in which they fully strip down.
"We all just sit there, completely naked, for one scene," he said.
Alas, the cutie pie was only joking.
"I would like to put everyone's mind at rest and let them know that the Volturi are not naked," director Chris Weitz wrote in a statement. "Jamie has what you might call a dry sense of humor and almost managed to convince me—which is why he's such a good actor. Anyway, be assured that, even though we do want the look of the Volturi to be a bit of a surprise, they are always—as in the book!—fully clothed."
Ah, well. You can't win them all.
Mooning for more New Moon? Don't worry, the new Twilight flick is Rising here in our gallery.