Popsugar Celebrity Max How Old Are the Gossip Girl Reboot Cast? Surprise, Surprise — Not All of the "Teens" in the Gossip Girl Reboot Are Actually Teenagers 29 June 2021 by Corinne Sullivan View On One Page Photo 8 of 9 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 8 How Old Is Tavi Gevinson, aka Kate Keller? 25 Previous Next Start Slideshow MaxStreamingGossip GirlTV