Audrina Patridge Debuts Slim Post-Baby Body, New Hair Color Less Than One Month After Giving Birth -- See the

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Audrina Patridge is back to brunette, and also appears to have gotten her pre-baby body back in no time at all.

The 31-year-old former Hills star showed off her new hair 'do on Instagram on Wednesday, going back to a darker hue after previously dying her locks blond. The profile shot also gave her fans a look at Patridge's slender body, less than a month after giving birth to daughter Kirra on June 24.

"I was missing my dark hair but still wanted to keep some blonde on the ends and around the face :)," Audrina, dressed in a black vintage tee and a bodycon skirt highlighting her flat stomach, captioned the pic.

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Her stylist, Briana Cisneros, also shared a before-and-after pic of Patridge, commenting that the new mom was "glowing" just three weeks after giving birth.

In a blog post about her birth experience last Monday, Patridge said she kept fairly active during her pregnancy, even during her third trimester.

"For anyone who has been there, you can probably relate when I say that the LAST thing I wanted to do was work out," she admits. "I went on a lot of walks and stayed fairly active during my third trimester, which definitely helped me a lot. I knew I wasn’t going to be pregnant forever, so why not enjoy it?!"

These days, Patridge and her fiance, Corey Bohan, couldn't be happier about their new role as parents.

"Corey reports for diaper and burp patrol on a regular basis," Patridge shares. "He usually let’s her lay on his chest around 4 a.m. so I can sleep for a few hours. He’s an amazing daddy already and Kirra knows his voice!"

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"We have passed the two-week mark, and I still feel like I can fall in love over and over and over again," she gushes. "Corey and I can’t stop staring at her in awe! We can’t believe we made this precious little angel."

Watch the video below for more on baby Kirra!

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