Lauren Chapin (May 23, 1945 – February 24, 2026) was an American actress who played the role of the youngest child Kathy Anderson (nicknamed Kitten) on the television show Father Knows Best between 1954 and 1960. She appeared in 196 episodes of the 203 in the series. Two of her older brothers were also child stars, Billy and Michael Chapin. [excerpted from Wikipedia]