Gerald Patrick Mathers is a former American actor best known for his role in the television sitcom Leave It to Beaver, originally broadcast from 1957 to 1963. He played the protagonist Theodore "Beaver" Cleaver, the younger son of the suburban couple June and Ward Cleaver and the younger 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.