The reality series, which is currently in production, will follow the returning fan favorites, their children and friends while they navigate their personal and professional lives.
Barton is best known for playing Marissa on "The O.C." before her character was killed off in 2007. She has acted in smaller roles in the last few years and most recently made headlines back in March when she denied crashing a U-Haul into a building. This will be her reality show debut.
After hearing the news, Spencer tweeted that he would be binge-watching "The O.C."
MTV confirmed the reboot at the 2018 Video Music Awards in August when some of the members hit the red carpet together. The network released a 30-second teaser the night of the awards show. Check out the trailer below.
"The Hills: New Beginnings" is slated to premiere in 2019.