Asa Bopp Farr Butterfield (born Asa Maxwell Thornton Farr Butterfield) is an English actor. He has received nominations for two Critics' Choice Awards, two Saturn Awards, and three Young Artist Awards. Beginning his career as a child actor, Butterfield first achieved recognition as the lead of the historical drama film The Boy in the Striped Pyjamas (2008). He continued to headline films during the 2010s, starring in the adventure drama Hugo (2011), the war science fiction film Ender's Game (2013), the drama X+Y (2014), and the fantasy Miss Peregrine's Home for Peculiar Children (2016). In 2019, Butterfield began portraying the lead of the Netflix comedy-drama series Sex Education.