Joan 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.In 1978, Van Ark landed her most famous role of Valene Ewing, who first appeared on the CBS series Dallas, then was a leading character for 13 seasons on its spin-off Knots Landing (1979–92). For her performance on Knots Landing, she won the Soap Opera Digest Award for Best Actress in 1986 and 1989. She left the show in 1992, although she did return for the series' final two episodes in 1993 as well as the 1997 miniseries Knots Landing: Back to the Cul-de-Sac. In 1985, she received a Daytime Emmy Award nomination as host of the Tournament of Roses Parade on CBS. From 2004 to 2005, she starred in the soap opera The Young and the Restless. She reprised her role of Valene in an episode of the new Dallas series in 2013.