Alison Margaret Arngrim is an American actress and author. Beginning her television career at the age of twelve, Arngrim is a Young Artist Award–Former Child Star "Lifetime Achievement" Award honoree, best known for her portrayal of Nellie Oleson on the NBC television series Little House on the Prairie from 1974 to 1982.

Danielle Spencer is an American actress and former child star best known for her role as Dee Thomas on the ABC sitcom What's Happening!!, which ran from 1976 until 1979. She would later reprise the role on the series' sequel, What's Happening Now!!