詳細介紹：Nancy Justine McKeon (born April 4, 1966) is an American actress. She is best known for her roles as Jo Polniaczek on the NBC sitcom The Fac…Nancy Justine McKeon (born April 4, 1966) is an American actress. She is best known for her roles as Jo Polniaczek on the NBC sitcom The Facts of Life and Jinny Exstead on The Division.詳情