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James Hibberd
July 08, 2011 AT 04:47 AM EDT

Another role has been filled on HBO’s Game of Thrones!

Actress Gwendoline Christie has been cast in the pivotal part of Brienne, announced Thrones author George R.R. Martin on his blog.

Brienne isn’t physically a very flattering character in the books, described as a large and piggish-looking woman with an awkward personality who’s mocked as “Brienne the Beauty.” But her character, who serves the late king’s brother Renly, is a fan favorite. Brienne is as tough and skilled with a sword as most men and longs for knighthood despite her gender. Christie is a relatively unknown actress who was in The Imaginarium of Doctor Parnassus and joins former Tudors star Natalie Dormer who was added to the Thrones season 2 cast a couple weeks back.

UPDATE: Here’s who will play Davos and here’s who is cast for Melisandre and Stannis.

Read more:

‘A Dance With Dragons’ 10 burning questions answered

‘Tudors’ star joins ‘Game of Thrones’ cast — EXCLUSIVE

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