Dark Horizons has revealed the visually striking poster for Joe Wright's upcoming teen assassin spy movie, Hanna, starring Saoirse Ronan, Cate Blanchett, Eric Bana, Olivia Williams, Tom Hollander and Downton Abbey's Michelle Dockery. Hanna opens this April in the United States. Watch the exciting Bourne-meets-Nikita (meets Modesty Blaise) trailer here.