In Peter Weir's war drama "The Way Back" (2010), Ronan played the supporting part of Irena, a Polish orphan during World War II, who joins escaped Siberian convicts in a trek to India. It co-starred Jim Sturgess, Colin Farrell and Ed Harris, and was filmed on location in Bulgaria, India and Morocco. The following year, Ronan reunited with Joe Wright to play the title character in the action film "Hanna", about a 15-year-old girl raised in the Arctic wilderness to be an assassin. The film co-starred Eric Bana and Cate Blanchett as Hanna's father and a villainous CIA agent, respectively. Ronan performed her own stunts and in preparation, she spent several months training in martial arts, stick fighting and knife fighting. Ronan's performance and the film's action sequences were praised by critics. In his review for "Rolling Stone", Peter Travers termed the film "a surreal fable of blood and regret" and labelled Ronan an "acting sorceress". "Hanna" proved to be a moderate commercial success. She also voiced the lead role in the dubbed English version of Studio Ghibli's Japanese anime film "Arrietty". At the age of 16, Ronan was invited to join the Academy of Motion Picture Arts and Sciences.