Maisie Williams enjoyed hanging out with "bearded, hairy men" in 'Doctor Who: The Girl Who Died'.

Maisie Williams with Jenna Coleman and Peter Capaldi in  'Doctor Who: The Girl Who Died'

Maisie Williams with Jenna Coleman and Peter Capaldi in 'Doctor Who: The Girl Who Died'

The 'Game of Thrones' actress joined the cast of the BBC One sci-fi drama for the upcoming ninth series and revealed her character is part of a useless band of Vikings with "insane beards" that are taught to defend themselves against the galaxy's most deadly army by the titular Time Lord.

Maisie revealed: "I feel like I've seen a lot of insane beards here on this shoot. I don't know which would have more, but it's very nice to have that familiar bearded, hairy men setting."

Despite the fifth episode being set in the past and loving the Viking outfits, the 18-year-old actress - who's known for playing Arya Stark in the medieval drama 'GoT' - thinks the best thing about being in the acclaimed series is it's "futuristic" setting.

She added: "It's so refreshing to have this futuristic element linked in to it too, that's what has kept me going really, not just beards and dragons. There's a whole new element that's fed in to the sides. It just looks so great with all of us in our Viking outfits, Jenna (Coleman) in her space suit and the Doctor in his cool coat with his crazy sunglasses. It makes for a really cool and interesting dynamic on screen."

Episode 5, 'The Girl Who Died' airs Saturday October 17 on BBC One.