It appears that the film population in Narnia has just grown by one. According to Daily Mail, young actor Will Poulter has joined the cast of The Chronicles of Narnia: The Voyage of the Dawn Treader.

Poulter, who recently starred in the indie hit Son of Rambow, will play Eustace Scrubb, a cousin of the Penevise siblings and a constant nuisance to them as well.

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The second Narnia movie, The Chronicles of Narnia: Prince Caspian, is currently in theaters and production of The Chronicles of Narnia: The Voyage of the Dawn Treader is said to start in October for a May 7, 2010 release.