Asa Maxwell Thornton Farr Butterfield (born 1 April 1997) is an English actor known for starring in the Holocaust film The Boy in the Striped Pyjamas (2008), portraying the young Mordred in the hit BBC TV Series Merlin, playing Norman in the 2010 film Nanny McPhee and the Big Bang, and taking the title role in Martin Scorsese’s 2011 fantasy Hugo (a film adaptation of the book, The Invention of Hugo Cabret by Brian Selznick). He will also portray Ender Wiggin in the upcoming film adaptation of the science fiction novel Ender’s Game by Orson Scott Card.