Mary Crosby
This daughter of singer-actors Bing Crosby and Kathryn Grant Crosby began playing sweet good girls, but over the course of her career Mary Crosby (billed early in her career as Mary Frances Crosby) is best recalled as evil Kristin Shepard, the character who shot Larry Hagman's J.R. Ewing during her 1979-1981 run on the CBS series "Dallas."