Michael Watson (alt Frankie Valli), Jon Boydon (Tommy Devito), Matt Nalton (Nick Massi), Edd Post (Bob Gaudio), Nicola Brazil (Mary Delgado), Sean Mulligan (Bob Crewe), Graham Vick (Gyp De Carlo), Matt Thorpe (Joey), Matthew Hunt (Norm Waxman), Lucinda Gill (u/s Lorraine), Sophie Carmen-Jones (Francine), Rob Wilshaw (Billy Dixon), Thomas Goodridge (Hal Miller), Stuart King (Hank Majewski)