Stars of The Office and The Avengers to join Game Of Thrones cast for new series and Michelle Fairley talks about the new Tully cast members!

With the much-anticipated third series of Game Of Thrones about to start production, the announcement of many new faces has left the fans excited for the premiere.

Included in the 14 cast members are Avengers star, Dianna Rigg who will play matriarch Olenna Tyrell on the hit Sky Atlantic show.

Joining her will be former Office star, Mackenzie Crook, who played Gareth in the emmy-nominated hit Ricky Gervais comedy, The Office, who has been cast as raider Orell.

The show’s third series is expected to air in the UK next year and a number of the new characters will be members of Robb and Catelyn Stark’s family, which is set to grow substantially.

Speaking to, Michelle Fairley, who plays Catelyn in the hit show, explained her connection to her two new Tully relatives.

“I’ve worked with Tobias [Menzies] before,” she told Access at Comic-Con of the former HBO “Rome” star (he played a young Brutus), who joins “GOT” as Cat’s brother, Edmure Tully, in Season 3. “We did a film together in Croatia a couple of years ago.”

Also joining the family is Bynden Tully, Robb’s great-uncle, who will be played  Clive Russell (a veteran of “Sherlock Holmes: A Game of Shadows”).

“I’ve worked with Clive as well and he’s a wonderful guy. We did a film together in Ireland a couple of years ago and he’s fantastic, and I love that character,” Michelle told Access. “He makes Catelyn feel very safe and secure and Clive is just a lovely, gentle man and a wonderful actor, so I feel very safe with him.”

Speaking of how the new family members will adapt to the Tully drama, Michelle hinted  at what might not make it in Season 3 (which premieres March 31, 2013 in the US) from the George R.R. Martin books.

“My family, the Tully family, they live in Riverrun and in the books they’re quite different because, there’s a whole sequence — my sister’s up in the Eyrie now — and in the books, my father is dying and I actually go and visit him and, of course, because it’s a television series and you need to keep the energy up, and the audience’s interest, as well, certain little shortcuts are taken,” she told Access. “So, I can’t give anything away, but… the scripts are amazing. They really are, they’re fantastic.”

Watch an interview with Michelle Fairley in the clip below:

Game Of Thrones, series 3 is due to  premiere on March 31, 2013 in the US, and is expected to be aired in the UK next year.