The 27-year-old is known for her wavy, long blonde tresses, however she opted to have a couple of inches cut off for a chic, shoulder-length bob with layers.
Kristin Cavallari unveiled her new short hair on Thursday
Kristin teased fans with a photo of her chopped off ponytail on Instagram earlier in the day, while she was getting her hair cut at Chris McMillan's salon in Beverly Hills.
"This is happening right now," she captioned the photo. "Just chopped off my hair! @anderssonjj @mrchrismcmillan."
The Hills star then headed to the launch of her new jewellery collection later that evening, giving her new hairstyle its first red carpet debut.
Kristin shared a photo of her chopped locks on Instagram
"Short hair don't care," she captioned a selfie on Instagram before heading out. "Off to the launch of my new jewelry line, @emeraldduvjewelry. Hair by @mrchrismcmillan// makeup by @karanmitchellmua//styled by @shayoonaboo".
The mother-of-two, who is married to Jay Cutler, looked effortlessly chic in a patterned royal blue dress which she paired with some white stilettos.
Wearing her hair down to show off her brand new look, Kristin opted for some bright blue eyeshadow to match her dress, and accessorised with some gold bangles on her wrists and arms.