"Game Of Thrones" Star Natalie Dormer Joins "The Hunger Games: Mockingjay"

Let the The Hunger Game of Thrones fan fics commence!

Lionsgate announced Thursday that Natalie Dormer has been cast in The Hunger Games: Mockingjay — Part 1 and Part 2.

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Natalie Dormer at the gala screening of The Heat in London on June 13, 2013.

She will play Cressida, a citizen of the Capitol assigned to document the life of Hunger Games champion Katniss Everdeen (Jennifer Lawrence).

Abraham Caro Marin / AP

Natalie Dormer during a Game of Thrones photocall in Madrid, Spain, on June 4, 2013.

Dormer, who has starred on Showtime's The Tudors and CBS' Elementary, is best known as Margaery Tyrell on HBO's Game of Thrones.

Helen Sloan / HBO

Natalie Dormer on Game of Thrones

So you know what that means: Let the The Hunger Game of Thrones mash-ups begin!

Keith Bernstein / HBO; Lionsgate