Hills Stars: How They’ve Changed

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Heidi Montag - Now

Montag, 23, underwent 10 plastic surgery procedures in one day last November, and is legally not allowed to have any more.

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Kristin Cavallari - 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.

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Kristin Cavallari - Now

She is still stirring up drama: She angered Audrina Patridge when she went after Justin Bobby. "It's fun to play the bitch," Cavallari, 23, tells Us.

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Audrina Patridge - Then

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

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Audrina Patridge - 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.

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Brody Jenner - Then

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

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Brody Jenner - Now

"Keep an open mind and watch," Jenner, 26, recently told MTV News of The Hills' sixth season.

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Stephanie Pratt - 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.

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Stephanie Pratt - 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."

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Lo Bosworth - Then

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

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Lo Bosworth - 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.

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Spencer Pratt - 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.

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Spencer Pratt and Heidi Montag - 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."