Chandler then tells Matarazzo, who turns 14 on Thursday, that she wants to give him a special birthday present. "I want you to actually know that Barb is alive and well and she is here today and she is going to come out," Chandler explains, as Shannon Purser, who portrays the fan favorite character, makes her way to the stage with a birthday cake.
This marks Purser's first TV appearance since her viral rise to fame, and she tells Handler that ever since the '80s-inspired series premiered over the summer, she's been "amazing."
"It was totally unexpected," she says of the internet's reaction to her character. "I had a great time with the kids and everybody on the show, and then suddenly it blew up, and people were tweeting about Barb, and I didn't think anybody would care and they did. It's been awesome."
Last month, Netflix announced Stranger Things is officially getting a second season, with nine episodes and four new characters. Ahead of the exciting news, ET caught up with Joe Keery, who dished all on his hopes for the new season, his character, Steve Harrington, and, of course, Justice for Barb.