KJ Apa had the support of his Riverdale family as he attended the premiere of his new movie, I Still Believe, in LA on Saturday. After walking the red carpet solo, the 22-year-old actor caught up with his TV costars Casey Cott and Charles Melton as they posed for a handful of photos together. KJ and Casey shared a few laughs as they wrapped their arms around each other, meanwhile Charles and KJ could barely keep it together as they took turns picking each other up. Seriously, who needs Varchie or Barchie when you have a bromance like theirs? Keep reading for even more fun pictures from the premiere.