Diana Joyce Hart (born October 8, 1963) is a Canadian-American writer, model, valet and wrestling personality. She is the youngest daughter of Canadian wrestling promoter Stu Hart and was the second to last child born to Stu and his wife Helen. She is best known for her several appearances for Stampede Wrestling and WWE often with her brothers Bret and Owen Hart as well as her husband Davey Boy Smith, and for her book, Under the Mat. She was also the 1997 "Mrs. Calgary Stampede". == Early life…