Welcome two new people to the Upside Down!

"Stranger Things" is adding two cast members for its second season, according to The Hollywood Reporter. Dacre Montgomery (pictured above) and Sadie Sink will play a brother and sister duo in the Netflix supernatural drama.

Older brother Billy is described as "hyper-confident and edgy," enjoys stealing other guys' girlfriends, drives a black Camaro, and is good at drinking games. Younger sister Max is "tough and confident" and acts and looks more like a boy than a girl. She has a "complicated history" and is suspicious of everyone.

"There's definitely a handful of really compelling new characters this season, but absolutely servicing the core group first and foremost," executive producer Shawn Levy told THR. "Like the show itself, it's multigenerational new characters and really, really intriguing ones."

In other "Stranger Things" season 2 news, cast members Joe Keery (Steve) and Noah Schnapp (Will) have been promoted from recurring status to regulars.

Season 2 is currently filming and expected to debut mid-2017.

Want more stuff like this? Like us on Facebook.