Matt Smith appeared on tonight’s Graham Norton Show, talking on the forthcoming Christmas special, Doctor Who fans, Karen Gillan’s departure and much more.

Smith says he’d known for a while of Karen’s departure:

“I’ve known a while, actually, because we’ve known for a couple of months. It’s by mutual consent - I think really those stories just come to a point where it reaches its conclusion, and the very essence of the show is that it constantly re-invents itself.”

And that while he wasn’t thinking of leaving the show, he’d miss Karen Gillan on set:

“I’m very happy to stay, I love it, I love making the show, but I’ll miss Karen because she’s a good mate, one of my best mates. She’s a cracker - mad as a box of cats - but she’s a firecracker, she really is.”

You can watch some highlights from the show below via the BBC and BBC America official YouTube channels: