Hills Stars: How They Have Changed

Kristin Then: She was a junior in high school when she taped the first season of MTV's Laguna Beach. She clashed with Lauren Conrad as they both vied for Stephen Colletti.

Kristin Now: She is still stirring up drama: She angered Audrina Patridge after going after Justin Bobby. "It's fun to play the bitch," Cavallari, 22, tells Us.

Heidi Then: When Montag began The Hills in 2006, she was BFFs with Lauren Conrad.

Heidi Now: She has since ended her friendship with Conrad and wed Spencer Pratt – as well as undergone a nose job and breast implants. Montag, 23, recently told Playboy: "I'm definitely not done with my surgical quest."

Audrina Then: During her first season of The Hills in 2006, she dated Spencer Pratt before romancing Justin Bobby and Australian BMX rider Corey Bohan.

Audrina Now: The aspiring actress, 24 — who's back on with Bohan and leaving The Hills after the sixth season — has surgery rumors. "I'm just losing my babyfat," she told Extra earlier this year.

Brody Then: Jenner (of the 2005 Fox reality show The Princes of Malibu) once romanced Lauren Conrad and Kristin Cavallari.

Brody Now: He is now dating Playboy Playmate Jayde Nicole. "Keep an open mind and watch," Jenner, 26, recently told MTV News of The Hills' sixth season.

Stephanie Then: Before joining The Hills in 2007, Spencer's sister struggled with drugs and later battled bulimia. "I remember saying, 'I can't believe how huge I look walking over to Lauren [Conrad],'" she tells Us.

Stephanie Now: Now healthy and happy, Pratt, 23, has a new outlook on her body: "The more I can stress about being honest, [the better]," she tells Us. "You are as healthy as your secrets."

Lo Then: She made her reality TV debut during her senior year of high school, appearing alongside BFF Lauren Conrad on MTV's Laguna Beach.

Lo Now: Bosworth, 23, is still tight with Lauren (they're roommates!) — and graduated UCLA in 2008. She has said she eventually wants her own talk show.

Spencer Then: He executive produced and starred on the 2005 Fox reality show, The Princes of Malibu, with ex-BFF Brody Jenner. A year later, he joined The Hills and met Heidi Montag.

Spencer & Heidi Now: Pratt, 26, wed Heidi Montag in spring 2009. Are kids next? "I'd love children," Montag recently said, "but Spencer doesn't. Hopefully, that will change, though."

Credit: Us Magazine