Whose sister did Melissa Sue Anderson play in "Little House on the Prairie?"
Melissa Sue Anderson Melissa Sue Anderson (born September 26, 1962) is an American-Canadian actress. She began her career as a child actress. Anderson is known for her role as Mary Ingalls on the NBC drama series "Little House on the Prairie".
Jean Sagal Jean Sagal (born October 9, 1961) is an American television actress and director. In the 1980s, she co-starred with her twin sister Liz Sagal in the 23-episode television series "Double Trouble" that ran from 1984–85. She has since appeared on such shows as "Picket Fences", "Knots Landing", "Quantum Leap" and "21 Jump Street". She has directed episodes of "Two and a Half Men", "Mad TV", "So Little Time" and "Just Shoot Me". Sagal and her twin sister also served for a time as the "Doublemint Twins" in the long-running ad campaign by Doublemint gum.