The 18-year-old actress – whose guest role in the long-running BBC One sci-fi drama was confirmed back in March – will make her debut on Saturday in an episode entitled The Girl Who Died and first-look photos have revealed more details about her character, Ashildr.

Debut: Maisie, 18, joins Jenna-Louise Coleman (Clara Oswald) and Peter Capaldi (The Doctor) as Ashildr in an episode entitled The Girl Who Died which airs on Saturday 17th October

Dream team: The episode is set in a ‘little Viking village where all the warriors have just been slaughtered’. The Doctor and Clara have 12 hours to train some farmers into warriors, as Ashildr () declares war upon the Mire

And young Maisie Williams is continuing to rack up the credits in between shooting the highly-anticipated sixth season and has jumped ship to Doctor Who.