Cressida is a film director working in the Capitol who winds up joining the rebellion with her assistant, Messalla, and her cameramen, Castor and Pollux.
Dormer, best known for playing Margaery Tyrell on "Game of Thrones," will soon be on the big screen in Ron Howard's Rush and Ridley Scott's The Counselor.
To be directed by Francis Lawrence and based on the novel by Suzanne Collins, The Hunger Games: Mockinjay follow Katniss Everdeenís (Jennifer Lawrence) journey as she leads the districts of Panem in a rebellion against the tyrannical and corrupt Capitol. As the war that will determine the fate of Panem escalates, Katniss must decipher for herself who she can trust and what needs to be done, with everything she cares for in the balance.
Josh Hutcherson, Liam Hemsworth, Woody Harrelson, Elizabeth Banks, Philip Seymour Hoffman, Jeffrey Wright, Stanley Tucci, Donald Sutherland and Julianne Moore are slated to star with the first part hitting November 21, 2014 and the final film arriving November 20, 2015.