Natalie Dormer Natalie Dormer

Game of Thrones star Natalie Dormer has joined the cast of The Hunger Games: Mockingjay Parts 1 & 2, Lionsgate announced Thursday.

Dormer, who plays Margaery Tyrell on the HBO series, will portray Cressida, a director from the Capitol who documents Katniss' (Jennifer Lawrence) journey through the upcoming rebellion.

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Mockingjay, the third book in The Hunger Games franchise, will be split into two movies, the first of which will be released on Nov. 21, 2014, followed by the last installment on Nov. 20, 2015. The second film, Catching Fire, will be released on Nov. 22, 2013.  

Dormer is also known for her roles on Elementary as Irene Adler and The Tudors as Anne Boleyn.

What do you think of Dormer's casting?