Talk about a transformation!

The Hills alum Heidi Montag made headlines when she underwent 10 plastic surgery procedures in one day. And it’s safe to say that the Heidi who was made famous by MTV in 2006 isn’t the same Heidi we know today — and we’ve got the before pics to prove it!

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heidi montag before getty

Heidi in 2006 vs. 2017.

Back in 2010, the now 30-year-old went from California to her parents’ home in Colorado to undergo an extensive list of procedures, including a breast augmentation, a nose job, fat injections in her face, an eyebrow lift, and a chin reduction.

The reality star’s transformation became a main plot point on the hit show and changed her life forever. But Heidi revealed in an interview with Entertainment Tonight that she doesn’t like to relive that part of her life.

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“I don’t want to watch it,” she said. “I think that it was hard enough going through it at that time and I was just in way over my head. I had no idea what I was getting into.”

Though the drastic transformation rose her level of fame, she admitted that it wasn’t an easy process and set her apart from the rest of her co-stars.

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“Everyone else in the show is in the clubs and dealing with this and that, and we were dealing with life-threatening, severe things,” the blonde beauty said. “We were just emotionally empty and spent at that point, and we just really needed support and set up a team, and not to be cut down by everyone. It was the hardest time of my life and I feel like I’ve become a lot stronger from it. And [it] made me look at myself and reflect, ‘Why did I do that?’”

Heidi may have changed her look drastically, but husband Spencer Pratt loves her all the same.

“I loved [her] pre-surgery. I loved her so much,” Spencer said. “And I loved Heidi post-surgery. I fell in love with Heidi’s dancing, so the [surgeries] did not affect her dance moves.”

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The couple, who wed in 2009, recently revealed another huge change in their life: they're expecting their first baby together.

“I have never been more excited. The reality is sinking in that we are going to have a child,” the mom-to-be told Us Weekly. “I’ve read every pregnancy book, and now I realize I don’t know anything.”

Things certainly aren’t slowing down for the MTV stars!

Scroll through the gallery below to see Heidi’s transformation over the years.