Mark Strong is a British actor best known for his film roles such as Prince Septimus in Stardust, Archibald in RocknRolla, Lord Henry Blackwood in Sherlock Holmes, Frank D'Amico in Kick-Ass, Jim Prideaux in Tinker Tailor Soldier Spy, Sinestro in Green Lantern, George in Zero Dark Thirty, Major General Stewart Menzies in The Imitation Game, Merlin in Kingsman: The Secret Service and Kingsman: The Golden Circle, Dr. Thaddeus Sivana in Shazam! Wikipedia