Doctor Who Executive Producer Steven Moffat says that the upcoming Christmas special will be "your favorite Christmas movies at once"—and to make sure we love it, he's gotten the episode an awesome guest star. Michael Gambon, best known for playing Albus Dumbledore in the Harry Potter franchise, will be putting in an appearance.
What will his role be? Moffat's not telling. We're guessing, since this IS a going to a Christmas special, after all, that Gambon will be popping up as Santa Claus. But nothing can be certain where a Time Lord is concerned.
The only plot detail released is that there'll be a honeymoon, presumably for Amy and Rory. Could it be that they'll be taking a TARDIS to the North Pole?
Wherever they're going, we plan on heading there with them. How about you?