Asa Butterfield

Though he rose to fame as the earnest little boy in the Holocaust drama "The Boy in the Striped Pajamas" (2006), English actor Asa Butterfield transcended the film's sub-par reviews and was lauded for his breakout performance as a German boy who befriends a youth trapped inside a concentration camp. From there, Butterfield went on to play the not-yet-evil Mordred on the BBC's young King Arthur adventure series "Merlin" (2008-09) and appeared …