Posted 1 hour agoSubscribe to Screen Time NewsletterCaret DownMadelyn Cline And KJ Apa Prove How Well They Know Each Other In This Hilariously Chaotic Costar TestNot Madelyn Cline making fun of KJ Apa's Archie from "Riverdale" hair.by Nora DominickBuzzFeed StaffFacebookPinterestLink Madelyn Cline and KJ Apa have both starred in two of the biggest teen TV shows in the last 10 years: Outer Banks and Riverdale.