Saoirse Ronan was terrific at fighting off other people in Hanna (and she’ll soon add more butt-kicking to her résumé as another teenage assassin in Violet and Daisy), but now she’s going up against her most formidable opponent yet: herself. Deadline reports that Ronan has been cast in Andrew Niccol’s big-screen adaptation of The Host, by Twilight author Stephenie Meyer; in the story about a young woman fending off an alien determined to usurp her consciousness, Ronan will play both human and alien. (The potential for romantic waterfall cuddling and chess playing seems awfully limited.) [Deadline]