It all begins with a howl, the unsettling sound which tells audiences that someone will soon become a werewolf. But the changes that occur during that transformation aren't just physical, they are psychological as well. Unremarkable men become domineering leaders. Innocuous men become violent and overtly sexual. In films from The Wolf-man and An American Werewolf in London to Ginger Snaps, when the protagonists become werewolves, their perceptions of their gender and their masculinity or femininity change dramatically. This volume explores how werewolves in cinema have provided an avenue for frank and often enlightening conversations about gender roles and masculinity. Werewolves are indeed a harbinger of change, but the genre of werewolf cinema itself has changed over time in how different styles of masculinity and different gender identities are portrayed.