By People Staff
Updated May 14, 2009 12:00 AM
B. Ach/INF; Goff/INF

A very familiar face will be coming to The Hills this fall: Laguna Beach alum Kristin Cavallari will be replacing the outgoing Lauren Conrad on the MTV series when the show returns for season 6.

“It’s a TV show,” Cavallari tells EW, which first confirmed the casting. “I’m not going into it like, ‘I’m going to make great friendships with these .’ It’s work! And drama sells. I think that’s why they’re bringing me in, because I know what works.”

And though the rivalry between Cavallari and Conrad is old news, Cavallari isn’t above taking a swipe at her former Laguna castmate. “I’m a completely different person than Lauren,” she says of how the Hills will be different with her as the new lead. “I have a lot more energy. I’m more outgoing. I’m a little more spontaneous.”

Cavallari’s first appearance will be on the May 31 season finale, where she catches the bouquet at Heidi Montag and Spencer Pratt’s wedding.

Come fall when the series returns, the 22-year-old bad girl says she will be more than game to stir the Hills pot — all in the interest of making good television.

When asked if MTV producers are plotting a potential relationship with Justin Bobby, the blonde bombshell laughed. “I have no idea… but they might try and set up situations,” she says. “I’m totally cool with that. Again, it’s a TV show and they need to make it entertaining.” –Tiffany McGee

Tell us: Are you surprised by the casting news? Will the Hills be more exciting with Kristin than LC?

B. Ach/INF; Goff/INF