Natalie Dormer has been cast in the third and fourth Hunger Games movies.

The Game of Thrones star will play the character of Cressida in the third and fourth instalments of the franchise, Mockingjay - Part 1 and Part 2.

Directed by Francis Lawrence and based on the novel Mockingjay by Suzanne Collins, the films will follow Katniss Everdeen (Jennifer Lawrence) as she leads a rebellion against the corrupt Capitol.

According to the Hunger Games books, Cressida is a film director who escapes The Capitol and shoots footage of Katniss during the uprising.

The Hunger Games: Mockingjay - Part 1 and Part 2 are set to be released on November 21 2014 and November 20, 15 respectively.

The next Hunger Games movie - Catching Fire - will be released in cinemas on November 22.

Dormer is best know for playing Margaery Tyrell in the hugely popular HBO fantasy series Game of Thrones. She also portrayed Anne Boleyn alongside Jonathan Rhys Meyers in The Tudors.