River Song to return at Christmas

The BBC announced today that River Song will be joinging the Dcotor on his Christmas adventure.
The eleventh Christmas special started filming this week and is written by showrunner Steven Moffat and, is directed by Douglas Mackinnon.

The BBC also released this synopsis:

“It’s Christmas Day in the future and the TARDIS is parked on a snowy village street, covered in icicles, awaiting its next adventure. Time traveller River Song meets her husband’s new incarnation, in the form of Peter Capaldi, for the first time this Christmas”.

Alex Kingston said on her reappearance:

“To be honest, I did not know whether River would ever return to the show, but here she is, back with the Doctor for the Christmas special. Steven Moffat is on glittering form, giving us an episode filled with humor and surprise guest castings. I met Peter for the first time at Monday’s read through. We had a laugh, and I am now excited and ready to start filming with him and the Doctor Who team. Christmas in September?, why not!”

Steven Moffat added:

“Another Christmas, another special for Doctor Who – and what could be more special than the return of Alex Kingston as Professor River Song? The last time the Doctor saw her, she was a ghost. The first time he met her, she died. So how can he be seeing her again? As ever, with the most complicated relationship in the universe, it’s a matter of time…”

The character of River first appeared in 2008. She’s often regarded as a marmite companion.
My feeling is that River is to Steven Moffat what Rose was to Russell T Davies. He’ll neve be able to resist bringing her back.