Theodore "Beaver" Cleaver is the fictional title character in the American television series Leave It to Beaver. Originally played by Jerry Mathers, Beaver is the son of June and Ward Cleaver and the brother of Wally Cleaver.

Leave It to Beaver is an American television sitcom that follows the misadventures of a suburban boy, his family and his friends. It stars Barbara Billingsley, Hugh Beaumont, Tony Dow and Jerry Mathers.