Her adulthood film roles included Liza in the film "Straight On till Morning" (1972), Claire in "Alfie Darling" (1976), Diana Sharman in "Funny Money" (1983), Vera Webster in "Superman III" (1983), Mrs. Hazeltine in "Throw Momma from the Train" (1987), Rose Brooks in "Witchery" (1988), Loretta Cresswood in "Pump Up the Volume" (1990), Tess Trainer in Robert Altman's "Short Cuts" (1993), and Lydia in "Blue Sky" (1994). She also appeared as Granny Ruth in the horror films "Basket Case 2" (1990) and "" (1991). She also had a bit part in Robert Altman's "The Player" in 1992. Ross also starred in Scottish Television's comedy-drama "Charles Endell Esquire" (1979).