Jack Warden (September 18, 1920 – July 19, 2006) was an American character actor.
Warden was born John H. Lebzelter in Newark, New Jersey, the son of Laura M. (née Costello) and John Warden Lebzelter, who was an engineer and technician. His father was Jewish and his mother was Irish American. Raised in Louisville, Kentucky, he was expelled from high school for fighting and eventually fought as a professional boxer under the name Johnny Costello. He had 13 welterweight bouts but earned little money.
He worked as a nightclub bouncer, tugboat deckhand and lifeguard before joining the United States Navy in 1938. He was stationed in China for three years with the Yangtze River Patrol.