Doctor Who's got a brand new enemy - and it's been designed by 13-year-old Press Packer Jessica!
If you thought Daleks or the Weeping Angels were the scariest monsters, then wait until you meet... The Screamer.
It was created by Jessica as part of a national competition for the Doctor Who Adventures magazine, and a model's been made for the Doctor Who Experience exhibition in London.
Watch the clip and see the monster come to life...