Natalie Dormer, best known for playing Margaery Tyrell in Game of Thrones, will play Cressida in The Hunger Games: Mockingjay parts 1 and 2.

Lionsgate confirmed the news via their Twitter account.

In the novel Cressida joins Katniss’ district-wide rebellion against the oppressive Capitol.

And similar to the Twilight and Harry Potter films, the final book in The Hunger Games series is being split into two parts.

Meanwhile, promotion for The Hunger Games: Catching Fire is ramping up ahead of the sequel’s release later this year.

The film, which stars Jennifer Lawrence, Josh Hutcherson and Liam Hemsworth, will receive its world premiere in London on November 11, 2013 as part of a 100-day countdown to Catching Fire’s release on November 21, 2013.