David Thewlis starred as Lord Petyr Baylish in the series Game of Thrones .
Other notable performances include playing Lord Petyr Baylish in the Game of Thrones television series aswell as featuring in 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 and Macbeth , in which he played King Duncan .
David Thewlis