David Thewlis (né Wheeler; born 20 March 1963) is an English actor. His most commercially successful role to date has been that of Remus Lupin in the Harry Potter film series. Other notable performances include the films Naked (for which he won the Best Actor award at Cannes Film Festival), Dragonheart, Kingdom of Heaven, The Boy in the Striped Pyjamas, The Theory of Everything, Black Beauty and Macbeth, in which he played King Duncan. He has also done voice work in the films James and the Giant Peach (1996), The Miracle Maker (2000) and Anomalisa (2015).