Lena Heady Joining to HBO's Game Of Thrones It's good to see her coming back to TV even though it not on The Sara Connor Chronicles . Lena Headey Any one who has seen the TV show or her Role in the movie 300, Knows that she is a great actress. Lena Headey has nabbed the last major part in HBO's Game of Thrones pilot, according to Maureen Ryan of the Chicago Tribune. Headey will portray Cersei Lannister , a woman of royal blood who is every bit as smart, cunning and devious as the powerful men around her. Other cast members include Peter Dinklage as Cersei's brother Tyrion , Nikolaj Coster - Waldau as Cersei's twin, Jaime, Sean Bean as aristocrat Ned Stark, Jennifer Ehle as his wife, Catelyn Stark, and Mark Addy as King Robert. HBO confirmed the casting of Headey on Tuesday. The Game of Thrones pilot, an adaptation of the fantasy novel by George R.R. Martin, starts shooting in late October in Northern Ireland. Please Leave A Comment- Source- SyFy