Maisie Williams will be making a trip to the TARDIS soon. The popular actor from HBO’s hit-series ‘Game of Thrones’ will be a guest-star on ‘Doctor Who,’ this according to the show’s official Twitter account and staff.

Long-time showrunner, Steven Moffat, also made an official announcement that Williams will be joining the cast as a guest-star. Williams is best known for her role as Arya Stark in the ‘Game of Thrones’ series on HBO. In a prepared statement Williams talked about joining the iconic series saying that she was, “excited to be working on Doctor Who as it’s such a big and important part of British Culture. I can’t wait to meet the cast and crew and start filming, especially as we’ll be shooting not too far from my home town.”

This is the second season featuring the latest Doctor, Peter Capaldi. Production for the series next season began filming back in January. On set filming for the new series, Peter Capaldi said earlier this year, “The adventures begin again for myself and Jenna and I’m delighted to be back filming my second season of Doctor Who.”

Paul Kaye (Game of Thrones) is also joining the cast for a two-part episode. A comedian and actor, Paul is also well-known for being the voice of Vincent the fox on the puppet-based BBC comedy Mongrels.

Commenting on his role, Paul Kaye said: “As a kid of the 1970’s, the two shows you always watched were Top of the Pops and Doctor Who, they were unmissable. I actually wrote a song called ‘Looking for Davros’ in my first punk band and I sang it like a demented Dalek. I got to present TOTP back in the mid ‘90’s and landing this role in Doctor Who completes the dream double. “Peter is a perfect Doctor and I’m loving every minute of the experience, even the five hours in make-up. What a treat, best 50th birthday present ever!”

Also starring in the premiere episodes will be Morven Christie (Death in Paradise, Twenty Twelve), Arsher Ali (The Missing, Wallander), Colin McFarlane (Citizen Khan, Eastenders), Steven Robertson (Utopia, In the Flesh), Neil Fingleton (Jupiter Ascending, Game of Thrones), Zaqi Ismail, and theatre actress Sophie Stone.