Ruth Gordon
Though relatively inactive in the 1950s and 60s, her career picked up again in 1968 after her infamously diabolical role as Minnie Castavets in "Rosemary's Baby," for which she won an Oscar as Best Supporting Actress. Gordon is perhaps best remembered as the octogenarian partner of 20-year old Bud Cort in Hal Ashby's black comedy "Harold and Maude" (1971).