Exclusive: Inside the Sudden Split Between ‘The Hills’ Star and TikTok Sensation

Looks like Cupid’s arrow missed its mark this time! After seven whirlwind months together, Kristin Cavallari and Mark Estes are no longer an item. A source exclusively confirmed to PEOPLE that the former reality TV queen, 37, is back on the market.
And it seems like the breakup is still stinging. During a stop on Alex Cooper’s Unwell tour in Austin, Texas, Cavallari opened up about her split with the 24-year-old Montana Boyz TikToker. “It’s fresh,” the The Hills alum admitted, giving the audience a taste of the real-life drama unfolding in her love life.
The pair first went public in February 2024, when Cavallari took to Instagram to debut their romance with a sweet selfie. “He makes me happy 🤍,” she captioned the snap, leaving fans swooning over the new couple. Social media played a big role in their love story, as a source previously dished that Cavallari and Estes originally met online.
Their relationship moved fast, with Cavallari even gushing she was “in love and obsessed” with Estes during a steamy Bahamas getaway earlier this year. The couple didn’t shy away from showing off their chemistry, sharing plenty of PDA-packed posts, including a romantic trip to Greece just two months ago. The duo sported matching all-white outfits, kissed under the Mediterranean sun, and looked every bit the picture-perfect pair.
So, what went wrong?
Just a few months ago, insiders were singing a different tune. “Everything is so good with Mark, and he’s amazing with her kids. It’s the happiest her friends have seen her in a decade,” a source revealed to PEOPLE back in May. Cavallari, who shares three children—Camden, 12, Jaxon, 10, and Saylor, 8—with ex-husband Jay Cutler, was riding high on cloud nine.
Friends of the Uncommon James founder said she was in a “fun phase,” living in the moment without putting any pressure on her romance with Estes. With her kids as her top priority, she embraced the easy-going vibes of her relationship. But now, it seems the carefree attitude couldn’t keep their flame alive.
While the reason behind their sudden split remains under wraps, Cavallari’s fierce independence and drive to focus on herself and her kids might have been a factor. Fans will have to stay tuned to see how Kristin navigates this fresh chapter of single life.
One thing’s for sure—this mama’s still got it, and the next chapter promises to be as unpredictable and fabulous as ever!