Whitney Port’s high school bestie is joining the cast of The City. Roxy Olin has been cast as Whitney’s new roommate on the spinoff of MTV’s wildly-popular docudrama The Hills.

“I’ve grown up with Whitney,” the actress — who also appears on the ABC drama Brothers & Sisters — told PEOPLE. “I danced with her for four years in high school, and our boyfriends were best friends, so we were always friends. We went our separate ways, but we reconnected instantly. We hang out everyday.”

Although The City is tagged as a “reality” show, Roxy cautions viewers not to believe everything they see.

“They’re only showing one part of who I am,” she said of The City. “They make me out to be a little bitch, but I’m not really at all.”

Fans will meet Roxy when the second season of The City premieres on MTV this Tuesday night.