17-year-old British actress Bella Ramsey who is best known for her breakout role as the fierce Lyanna Mormon in Game of Thrones has been cast in the much awaited HBO series adaptation of hit video game The Last of Us. The series adaptation has casted Pedro Pascal as Joel and Bella Ramsey in the role of Ellie, reports Variety. Craig Mazin, who created HBO’s acclaimed limited series Chernobyl, is penning the script and executive producing with Neil Druckmann.