Jon Lee (alt Frankie Valli), Ben Wheeler (u/s Tommy Devito), David McGranaghan (Nick Massi), Edd Post (Bob Gaudio), Nicola Brazil (Mary Delgado), Stuart King (u/s Bob Crewe), Mark Halliday (u/s Gyp De Carlo), Ben Jennings (Joey), Jake Samuels (Norm Waxman), Lucy Martin (Lorraine), Gemma Whitelam (u/s Francine), Tommie Earl Jenkins (Hal Miller), Chris Gardner (Hank Majewski)