“Stranger Things” star Finn Wolfhard is happy with the addition of Sadie Sink and Dacre Montgomery to the Season 2 cast, but it seems not everyone shares his opinion about it.

On Friday, Oct. 14, Wolfhard, who plays Mike Wheeler in the hit Netflix series, took to Twitter to welcome Sink and Montgomery to the “Stranger Things” family. “Welcome to the cast!” he posted, along with a screenshot of an article announcing the pair’s casting.

However, the 13-year-old actor also took the time to address the backlash over the two’s addition to the cast. Wolfhard asked fans to wait for the series to actually air before criticizing the producers’ decision to cast Sink and Montgomery. “Jeez everyone calm down!! None of you have seen anything from S2. We don't even know what's happening. I guarantee that you will all live (sic) it,” he wrote.

After Sink and Montgomery’s casting was announced, countless of fans took to Twitter to slam “Stranger Things” for adding two more white actors to a show which has already been criticized for its lack of diversity. Some pointed out that among the cast, Lucas (Caleb McLaughlin) is the only POC and there is no LGBTQA representation. Check out some the fans’ tweets below!

“If lucas is still the only poc and theres no lgbtq+ rep then no i wont love it (sic),” a Twitter user wrote, as quoted by New York Daily News. Another fan tweeted, “I need more black people in 'Stranger Things.'”

Meanwhile, Montgomery and Sink will play the roles of Billy and Max in “Stranger Things” Season 2. Max is described as a “tough and confident girl whose appearance, behavior and pursuits seem more typical of boys than of girls in this era. She has a complicated history and is generally suspicious of those around her.” On the other hand, Billy will be “Max’s hyper-confident and edgy older step-brother. He steals girlfriends away from their boyfriends, is great at drinking games and drives a black Camaro. But lurking under his apparent charisma, is a violent and unpredictable nature,“ according to The Hollywood Reporter.

“Stranger Things” executive producer Shawn Levy opened up about the new additions to the cast in an interview with the outlet. “There's definitely a handful of really compelling new characters this season, but absolutely servicing the core group first and foremost. Like the show itself, it's multigenerational new characters and really, really intriguing ones,” said the exec.

In addition, Season 1 cast members Noah Schnapp and Joe Kerry, who play Will Byers and Steve Harrington, respectively, have been promoted to series regulars.

There’s still one more character in Season 2 who needs to be cast, but fans will have to wait a little more to find out who the new addition will be. “Stranger Things” Season 2 is expected to air in summer 2017.