High Quality Content by WIKIPEDIA articles! Margaret Julia Marlo Thomas (born November 21, 1937) is an American actress, producer, and social activist known for her starring role on the TV series That Girl (1966-1971). Thomas was born in Detroit, Michigan, the eldest child and elder daughter of Lebanese-American comedian Danny Thomas (1912 1991) and his wife, the former Rose Marie Cassanti (1914 2000). Her brother, Tony Thomas, is a television and film producer, and her sister, Terre Thomas, is a former actress.