Kathryn Loder (born June 23, 1940 - October 18, 1978) was an American actress known mostly for her brief but memorable film career playing slinky, over-the-top female heavies, she was foremost a well-regarded stage actress, garnering mostly leading roles that were light years away from the B-movie arch-types on display in 1971's The Big Doll House and 1974's Foxy Brown.