Little House on the Prairie sisters Melissa Gilbert and Melissa Sue Anderson have squashed any bad blood decades after the show wrapped. "Worlds collide. Blessings abound. Hearts heal and reunite. Magic happens," Gilbert, 61, wrote via Instagram on Saturday, December 27. "Last night after @penpalsplay my genius costar @veannecox had a surprise in the audience. Boy, am I glad I didn't know in advance that the remarkable @blbuckley was there. But I had a secret of my own.