Margaret Hall (1931 - December 21, 2015) was an American actress and performer whose career lasted over six decades, beginning in the early 1950s. In 1960, she appeared in a Broadway production of Becket, starring Laurence Olivier and Anthony Quinn. In addition to her theater work, Hall had regular roles on the daytime dramas One Life to Live and As the World Turns and the nostalgic AMC series Remember WENN. In 2004-05, she had an ongoing spot on The Late Show with David Letterman — at the end of each episode, she would wave goodnight to the a…