‘Little House on the Prairie’ Star Alison Arngrim Dishes on ‘Mortal Enemy’ Melissa Gilbert

Alison Arngrim and Melissa Gilbert might have played mortal enemies on Little House on the Prairie, but that couldn’t have been any further from the truth in real life.

The actresses came back together for the show’s 50th Anniversary Cast Reunion and Festival in Simi Valley, California, on Saturday, March 23, and Arngrim spoke to People about their relationship on and off-screen.