A child actress in her native Britain since the age of six, Anna Popplewell made her feature film debut in “Mansfield Park” (1999). A string of supporting roles in UK film and television projects followed, including the all-star miniseries “Love in a Cold Climate” (2003) and the feature “Girl with a Pearl Earring” (2003). In 2004, she was cast as the sensible Susan Pevensie in Disney’s film version of the classic C.S. Lewis fantasy “The Chronicles of Narnia: The Lion, the Witch and the Wardrobe” (2005). The film’s Oscar win and box office success necessitated a sequel, and Popplewell returned