YH is hanging out with the cast of "Riverdale" at WonderCon as they get ready to meet their devoted fans! We chat with Cole Sprouse, K.J. Apa, Lili Reinhart, Camila Mendes, Ashleigh Murray, Marisol Nichols, and, of course, Luke Perry about the success of the show based on Archies comics, plus Luke shares some advice he imparted on his next-gen co-stars, and they each pick out 3 emojis to describe the show!