Who's the monster?Who's the monster?When this star's family tune in to see her in the Doctor Who Christmas special, they might think she was cut.

But she hasn't been - she's just unrecognisable as a half-human, half-spider.

Cutting It actress Sarah Parish is a long way from her usual pretty self in the costume she donned to play the Empress Of Rachnos.

She said: "It was very, very difficult to move around.

"I started make-up at three in the morning. I think the nose was mine and the chin was mine but nothing else.

"It took me half an hour to get it off. It was a heavy, cumbersome costume but I loved it."

Sarah isn't the only guest face on the show this Crimbo.

Catherine Tate with David TennantCatherine Tate with David TennantCatherine Tate will also appear, as a potential assistant for the Doctor.