Actress Sara Gilbert is best known for her role as Darlene Conner in the popular sitcom 'Roseanne' from 1988 to 1997. She has also appeared in films such as Poison Ivy, Light It Up, and Riding in Cars with Boys. Melissa Gilbert is an American actress best known for her role as Laura Ingalls Wilder in the television series 'Little House on the Prairie' from 1974 to 1983. She has also appeared in films such as The Miracle Worker, Sweet Justice, and The Diary of Anne Frank.