Mary Loretta Hartley (born June 21, 1940) is an American film and television actress. She is possibly best known for her roles in film as Elsa Knudsen in Sam Peckinpah's Ride the High Country (1962), Susan Clabon in Alfred Hitchcock's Marnie (1964), and Betty Lloyd in John Sturges' Marooned (1969). She has appeared extensively on television, with notable roles as Claire Morton in the ABC soap opera Peyton Place (1965), various roles in the CBS television Western drama series Gunsmoke, and a series of commercials with James Garner in the 1970s and 1980s.