If you've seen Riverdale, or follow any of the cast members on social media, then you'd know how close the cast is. They don't just hang out on set, but they're always together whether that's working out, grabbing food, or just hanging at each other's houses. So when the news of Luke Perry's death came out, you can imagine how hard it was on everyone. Especially KJ Apa, who played his son. KJ Apa speaks out for the first time about co-star Luke Perry's death.\nWhen you're grieving, the last thing you want to do is post on social media. Fans were anxiously awaiting KJ to post a tribute to his on-screen dad, Luke Perry, and they finally got a beautiful one. If you're not familiar with the show, KJ Apa plays Archie Andrews and Luke Perry played his dad, Fred Andrews.\nThe two had so many scenes together as they both had major storylines. Production actually shut down this week and indefinitely to mourn the loss of Luke, and this has given some time for the cast to speak out.\n@kjapaembedded via\nIn a beautiful post that gained over 3 million likes, KJ wrote a brief caption that said, "Rest in love bro". The photo shows Luke on a boat, smiling so big. It's a really beautiful tribute. So many of Luke's friends and family spoke out about his death and each one talked about how welcoming, nice, and funny he was.\nREAD MORE: Lili Reinhart, Casey Cott, And Other 'Riverdale' Stars React To The Loss Of Co-Star Luke Perry\nIf you're wondering what will happen to Riverdale after Luke's passing, it's kind of up in the air. There are some answers, and they're actually tributing each episode to him from now on. We're not entirely sure how they will incorporate his death into the show, but it will not be an easy episode to watch, that's for sure.