Starring alongside British comedy duo Simon Pegg and Nick Frost, Butterfield takes on the role of Willoughby Blake in the horror-comedy "Slaughterhouse Rulez." This "Harry Potter" meets gory slasher film follows Willoughby and other students of the Slaughterhouse public school, which is filled with mystery, evil creatures, and secrets. When the students encounter a giant monster at the school, they must do everything to survive.