Erich Bergen is an American television, film and stage actor raised in New York City. He co-stars on CBS's Madam Secretary opposite Tea Leoni. He previously starred as Bob Gaudio in the Clint Eastwood-directed feature film Jersey Boys. Bergen played that role on stage for more than 1,000 performances in the Grammy- and Tony-winning Best Musical of the same name. He also performed with the 2012 Roundabout Theatre Company National Tour's production of Anything Goes as Billy Crocker. When not acting on screen, Bergen performs live shows as a solo singer and pianist, modeling his shows off the romantically old school feel of Dean Martin and Frank Sinatra.