"Hanna" star Saoirse Ronan is set to topline Kevin Macdonald's "
How I Live Now," an indie drama based on the 2004 novel by Meg Rosoff.
Ronan will play Daisy, a teenage girl from New York City who travels to England to spend the summer with family in the English countryside. When World War II breaks out and insurgents invade, Daisy and a younger girl named Piper must survive alone in the woods as they try to make it to safety.