Game of Thrones actress Natalie Dormer has been cast in The Hunger Games: Mockingjay Parts 1 & 2, which are the final two installments of the franchise.
Dormer plays Margaery Tyrell on the HBO fantasy series, and according to THR she will be playing the character Cressida in the Mockingjay films.
Cressida is a film director from the Capitol who joined the rebellion along with her camera crew. She is told to follow Katniss throughout her journeys in the rebellion so they can make propaganda videos to encourage strength and morale in the rebels.
The Hunger Games: Mockingjay Part 1 is set to be released November 21st, 2014 and The Hunger Games: Mockingjay Part 2, on November 20th, 2015.
Here's the description of the book that the third and fourth films will be based on:
Against all odds, Katniss Everdeen has survived the Hunger Games twice. But now that she’s made it out of the bloody arena alive, she’s still not safe. The Capitol is angry. The Capitol wants revenge. Who do they think should pay for the unrest? Katniss. And what’s worse, President Snow has made it clear that no one else is safe either. Not Katniss’s family, not her friends, not the people of District 12.