Stephen Chbosky, the author of "The Perks of Being a Wallflower" and director of its 2012 big-screen adaptation, is attached to direct Wonder from a screenplay by Steve Conrad, reported Entertainment Weekly.
"Wonder" tells the story of 10-year-old Auggie Pullman (Tremblay), a boy with a facial deformity who enrolls in a private school after years of homeschooling.
Roberts, 48, is set to play Auggie's mother in the book adaptation of R J Palacio.
Mandeville Films' Todd Lieberman and David Hoberman will serve as producers.
The young actor played the role of a boy who finds it hard to come to terms with the reality after being rescued from an underground room where he was trapped with his mother by a kidnapper.
