Sandra Peabody (born January 11, 1948 in Portland, Oregon) is an American actress, writer, producer, and acting coach. She is best known for her role as Mari Collingwood in Wes Craven's 1972 horror movie "The Last House on the Left". She is known for her roles in horror movies such as "Voices of Desire" (1972), "Massage Parlor Murders!" (1973), and "Legacy of Satan" (1974). Peabody quit acting in the mid 1970s and now works as an acting coach, writer, and producer.