The revival, set to premiere in 2019, will reunite original cast members, alongside their children, friends and some new faces
Mischa Barton is returning to the small screen — and making her reality TV debut.
A source confirms to PEOPLE that the actress has joined the cast of The Hills reboot. MTV later confirmed the news, too.
Though she never appeared on the original series, which aired for six seasons from 2006-2010, Barton, 32, has a special connection to the MTV show. At 17, she was catapulted to fame for her starring role as Marissa Cooper on Fox’s The O.C., which premiered in 2003 and became a cult phenomenon almost overnight. The O.C. inspired MTV’s Laguna Beach: The Real Orange County, which eventually spun off into The Hills.
The Hills: New Beginnings was announced in August, when a handful of cast members reunited on the red carpet at the MTV Video Music Awards. The revival, set to premiere in 2019, will reunite original cast members, alongside their children, friends and some new faces, and follow their personal and professional lives while living in Los Angeles.
“But she wants everyone to enjoy themselves,” the source added. “She wishes everyone the best.”
RELATED VIDEO: MTV Announces The Hills Reboot at the 2018 VMAs
As for Cavallari, 31? An insider told PEOPLE at least one reason for her absence is that the reboot would conflict with her current contract at E!, which recently announced a second season of Very Cavallari, a reality show following her life with husband Jay Cutler in Nashville as she manages her brand, Uncommon James.
“She can’t do the show because she has a contract with E!” the source said. “But she’s still close with Heidi and Spencer and is excited for them.”
The Hills: New Beginnings is slated to premiere in 2019.