Joan van Arc1
Joan van Arc2

Joan Van Ark (born June 16, 1943) is an American actress, most notable for her role as Valene Ewing, which she originated on the CBS series Dallas and continued for thirteen seasons on its spin-off, Knots Landing. Van Ark has also received a Theatre World Award and been nominated for a Tony Award for her stage work.

Peter Griffin shows Meg before and after pictures of Van Ark in "Quagmire and Meg" claiming that her looks changed after sex with Glenn Quagmire. When Lois tries to order Peter away from Meg, Chris accidentally gets a view of the "after" picture and turns to crumbled stone.