Christopher Walken has joined the cast of Clint Eastwood’s Jersey Boys, a film adaptation of the hit stage musical. Walken will be playing Angelo “Gyp” DeCarlo, a Jersey mobster. Walken is the biggest name attached, as Eastwood chose to cast actors from the stage musical in the lead roles. Vincent Piazza, John Lloyd Young, Erich Bergen, and Michael Lomenda are reprising the roles they played in their various stage productions of Jersey Boys.