Saoirse Ronan Will Play Mary Queen of Scots

NEW YORK, NY - MAY 02: Actress Saoirse Ronan attends the "Alexander McQueen: Savage Beauty" Costume Institute Gala at The Metropolitan Museum of Art on May 2, 2011 in New York City. (Photo by Stephen Lovekin/Getty Images) *** Local Caption *** Saoirse Ronan; Photo: Stephen Lovekin

Newly 18-year-old Saoirse Ronan has signed on for Mary Queen of Scots, looking a little further back than the warring twentieth century she broke out in with Atonement and is dipping back to for Testament of Youth. Written by Michael Hirst (The Tudors, both Elizabeth films), the film will star Ronan as the 1500s ruler who became queen at age 1. Intriguing.