Joan Martha Van Ark is an American actress. She is best known for her role as Valene Ewing on the primetime soap opera Knots Landing. A life member of The Actors Studio, she made her Broadway debut in 1966 in Barefoot in the Park. In 1971, she received a Theatre World Award and was nominated for the Tony Award for Best Featured Actress in a Play for the revival of The School for Wives.
