King, who created Pretty Little Liars and its two spinoffs based on Sara Shepard's YA novels, isn't part of the Pretty Little Liars: Original Sin from Riverdale boss Roberto Aguirre-Sacasa. On Friday, without mentioning the spinoff, King tweeted thanks to fans of the original show: “The #OGPLL fans are the most passionate, loving and loyal in the universe. Thank you for all of your support. We are family forever. I love you. (heart) #PLLFamily #OGPLLFamily,” she wrote.