Billy Chapin (born December 28, 1943 in Los Angeles) is an American former child actor, known for a considerable number of screen and TV performances from 1943 to 1959 and best remembered for both his roles as the “diaper manager” Christie Cooper in the 1953 family feature The Kid from Left Field, starring Dan Dailey, Anne Bancroft and Lloyd Bridges and little John Harper in Charles Laughton's 1955 film noir classic The Night of the Hunter, opposite acting legends Robert Mitchum and Lillian Gish.He is the brother of former child actors Lauren Chapin, known as Kathy “Kitten” Anderson from the TV series Father Knows Best (1954–60) and Michael Chapin, another successful child performer of the 1940s and 1950s.He is also an uncle of professional singer Summer-Healey Chapin, his sister's daughter.