A star in human form (Laura Brent) dazzles heroes Lucy (Georgie Henley), Caspian and Edmund (Skandar Keynes). "She sets hearts fluttering," says Barnes.
Lucy encounters Aslan (Liam Neeson), who's not the only special effect: "There's sea serpents and a boy who turns into a dragon!"
Ben Barnes returns as Caspian in the third movie based on C. S. Lewis' books (out Dec. 10). "This is my favorite," he says. "Playing a king in charge of a crew on the high seas-it's a role that dreams are made of."