The Chronicles of Narnia (although we do not learn their surname until "The Voyage of the Dawn Treader"), and eventually become Kings and Queens of Narnia reigning as a tetrarchy. Although introduced in the series as children, the siblings grow up into adults while reigning in Narnia. They go back to being children once they get back to their own world, but feature as adults in "The Horse and His Boy" during their Narnian reign. All four appear in "The Lion, the Witch, and the Wardrobe" and "Prince Caspian"; in the latter, however, Aslan tells Peter and Susan that they will not return, as
The Chronicles of Narnia: The Lion, the Witch and the Wardrobe 1990s, producers Frank Marshall and Kathleen Kennedy were planning a film version. They could not find a space in Britain to shoot the film during 1996, and their plans to set the film in modern times made Douglas Gresham oppose the film, in addition to his feeling that technology had yet to catch up. Perry Moore began negotiations with the C. S. Lewis Estate in 2000. On December 7, 2001, Walden Media announced that they had acquired the rights to "The Chronicles of Narnia". The success of "Harry Potter and the Philosopher's Stone" prompted the producers to feel they could