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".
Melissa Claire Egan Melissa Claire Egan (born September 28, 1981 in Pound Ridge, New York) is an American actress, best known for her roles as Annie Lavery on "All My Children" and Chelsea Lawson on "The Young and the Restless".