The Radio Times 11th-17th December issueFeatures a Doctor Who cover.
Katherine Jenkins interview within says
It was far worse than any nerves I've ever had for any performance. I spent a lot of time thinking about it; it's such an iconic show, and it's one that we watch as a family. I just thought, "I'd love to give it a try." But I'm the first to say I don't really consider myself an actress. So, I asked if I could go in and read to them and I thought, "Well, if I'm rubbish they won't give it to me, will they?" So I read to them and they called me on my 30th birthday and offered me the part.
Matt Smith says
It was a great privilege to do it. It's something I've always wanted to do since I started the show. I love Christmas, plus I've always wanted to film something in July that has got snow in, loads of snow ... it's very Christmassy.