British-born Asa Butterfield began his acting career when he was eight years old, playing the role of Andrew in the 2006 TV movie After Thomas. He would make a bigger splash the next year, with a role in the indie comedy Son of Rambow, and again the next year, in the Holocaust drama The Boy in the Striped Pyjamas. Butterfield then took on the role of Mordred in the TV series Merlin, before joining the cast of the 2010 family film Nanny McPhee and the Big Bang. ~ Cammila Albertson, Rovi