This brought us waaay back!

Kristin Cavallari made our entire day on Thursday when she posted an epic throwback photo with Laguna Beach costar Stephen Colletti — yes, STEPHEN from her love triangle with Lauren Conrad!

The memories!!!

Related: Kristin Does It All As A Working Mom!

The 29-year-old commented on the roughly 12-year-old picture saying:

“Flipping through#BalancingInHeels is a little trip down memory lane. We were babies! Link in bio#LagunaBeach #HighSchool #TBT”

Relive the glory days with the snap (below)!

Wow, we feel hella old!

Sounds like Kristin is doing a little promo for her new book Balancing in Heels — and she’s definitely got our attention!

In case you need a refresher, Colletti left the MTV hit show after two seasons before heading to San Francisco State University and later dabbling in acting.

Kristin stayed in the public eye, settled down with footballer Jay Cutler, had some babies, and launched a successful career in lifestyle/fashion.

Thanks for that little stroll down memory lane, K.C.!

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