16-year-old Sokka is not only Katara's older brother, but he also serves as the comedic relief for the group. Ousley is no stranger to Netflix as he previously starred as Robby Corman on 13 Reasons Why. "I can NOT believe it but I've been cast as Sokka!! in @netflix live action adaptation of avatar the last air bender," he said in a post on Instagram. "So I'm gonna be checked out for the rest of the day. just CHILLIN and sipping my cactus juice. (it's the quenchiest)."