Young actors Freddie Highmore ("Charlie and the Chocolate Factory") and Sarah Bolger ("In America") have signed to star in Paramount's big-screen rendition of "The Spiderwick Chronicles," which is based on the very popular series by Holly Black and Tony DiTerlizzi.

From The Hollywood Reporter: "Mark Waters ("Mean Girls") will direct the film from a screenplay by John Sayles ("Limbo")... In the movie, the three Grace children move to the ancient Spiderwick mansion, where they discover Brownie, an enchanted creature who introduces them to a world of goblins, fairies and sprites."

Production gets underway in September.