Lucy Boynton, Babou Ceesay and Peter Mullan have joined the second season of HBO's A Knight of the Seven Kingdoms. Boynton will play Lady Rohanne, Ceesay will be Ser Bennis and Mullan is Ser Eustace Osgrey in the Game of Thrones universe series, which is set around 90 years before the original series' timeline begins. [...]