At 18 he married a go-go dancer. Co-star Fred MacMurray did not approve. The six-year marriage ended in 1974. The marriage produced a daughter, Samantha.
On "My Three Sons" (1960) he often threw away fan mail unread, becoming the "black sheep of the family".
Played the brother of his real-life brother Barry Livingston on "My Three Sons" (1960).