Horror, humor and romance meet in Horns, which finds Daniel Radcliffe playing Ignatius “Ig” Perrish, a man who starts growing devil horns after he’s accused of killing his girlfriend. Looking like hell (literally) has its perks, though — the horns cause people to confess their deepest and darkest thoughts, which helps Ig’s quest for the truth about his girlfriend’s murder. TIME caught up with the 25-year-old Harry Potter alumnus to talk about the film — opening just in time for Halloween — the prosthetics, and his favorite of the seven deadly sins. TIME: You must have spent a lot of time in hair and makeup with those horns. Daniel Radcliffe: Maybe not as much as you’d think!