Kristin Cavallari turns up the heat in a white bathing suit… after hugging her high school sweetheart ex Stephen Colletti

Newly single pinup star Kristin Cavallari is definitely changing her public image.

The 33-year-old Hills veteran was seen striking a bombshell pose in a white bathing suit for an Instagram post on Thursday to plug her jewelry line Uncommon James.

This comes after the estranged wife of football vet Jay Cutler hugged her ex-boyfriend Stephen Colletti.

How you like me now? Kristin Cavallari is definitely changing her public image. The 33-year-old Hills veteran was seen striking a bombshell pose in a white bathing suit for an Instagram post on Thursday to plug her jewelry line Uncommon James

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In this new image the reality TV siren made her toned figure the focus as she curled up her legs while in a plunging white one-piece suit.

The single photo was carefully constructed with the blonde sitting on a white photographer’s backdrop. There were also white vases with edgy, modernist designs that contained long-stemmed  white lilies.

The looker placed one foot under her thigh and held onto her bare foot as she raised her chin to share a confident pearly white smile all while wearing her Uncommon James jewelry – earrings and a ring.

Star power: The looker raised her chin to share a confident pearly white smile all while wearing her Uncommon James jewelry

And to complete the glam look, the entrepreneur added oversized black sunglasses that screamed Hollywood.

The short caption read, ‘So excited for our jewelry + sunglasses collab! Head to UncommonJames.com to check it out!’

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This comes the day after Kristin sent out shockwaves while posing with her ex.    

The former couple’s romantic relationship was well-documented as part of the hit MTV series Laguna Beach, and fans went wild in the comments with speculation over what it all could mean.

A thing for white: In July the leggy lady also posed in white, this time a lace top

In the dimly-lit photo, Kristin wrapped her arms around Stephen as the duo turned towards the camera and smiled. 

The selfie comes just four months after Kristin split from her husband Cutler, whom she was married to for seven years and shares three children with. 

Kristin continued to get fans guessing with her caption, which read, ‘2004 or 2020?!’ 

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Her Instagram stories were a dead giveaway however, with Kristin sharing a photo of herself promoting her Uncommon James jewelry while wearing the exact same outfit.  

While fans attempted to figure out what was going on between the former lovers,  sources told TMZ the pair have not rekindled their relationship and are simply friends.

The photo was taken during a recent trip Kristin took to Laguna Beach, where she met up with Stephen and former costar Alex Murrel.    

Laguna Beach alert! Cavallari sent MTV fans into a frenzy after posting a cuddled up selfie with her high school sweetheart ex, Stephen Colletti

MTV fans will definitely remember all the drama that transpired on the hit series Laguna Beach, which chronicled the lives of teenagers living in the affluent beach town from 2004 to 2006. 

Stephen was famously involved in a love triangle with both Kristin and her rival Lauren Conrad.

Looking back on the drama in her book Balancing in Heels: My Journey to Health, Happiness, and Making It All Work, Kristin claimed Stephen was pressured by producers to hang out with Lauren during their relationship.  

Kristin admitted she felt threatened by the new dynamic, and was ‘deeply’ impacted by what the producers had done.   

Making a splash: The former couple’s romantic relationship was well-documented as part of the hit MTV series Laguna Beach 

Love rivals: Stephen was famously involved in a love triangle with Kristin and her rival Lauren Conrad on the series 

‘We loved hard and fought hard. My relationship with Stephen went from our own high school romance to the fodder of a hugely successful television show,’ she wrote, according to an excerpt obtained

‘Normal high school relationships are dramatic enough, but ours now had the added pressure of being seen by MTV viewers across the country as well as being manipulated by the show’s producers, a set of adults were very suddenly involved in the intricacies of our lives. 

‘Surprisingly, the producers had a bigger effect, as they controlled and mapped our lives more than we were aware. One of the most hurtful things they did was pressure Stephen to spend time with another girl from the show, Lauren, while he and I were dating. 

‘It certainly provided some juicy conflicts, but it also affected me deeply. I felt threatened. On one side, it seemed like the producers were trying to break us up, which was intimidating. On the other side, I was worried that my relationship with Stephen was becoming less stable, even though I knew if we hadn’t been on television, he wouldn’t have been spending time with another girl.’  

Surf’s up! MTV fans will definitely remember all the drama that transpired on the hit series Laguna Beach, which chronicled the lives of teenagers living in the affluent beach town from 2004 to 2006

Family matters: Cavallari shares sons Camden, seven, Jaxon, six, and daughter Saylor, four, with; seen in 2015Kristin Cavallari reveals her new jewelry fall collectionLoaded: 0%Progress: 0%0:00PreviousPlaySkipMuteCurrent Time0:00/Duration Time2:22FullscreenNeed Text

Kristin admitted the relationship meant the world to her, but harbored concerns about the impact the cameras had on their romance. 

‘Stephen was the most important thing in my life, and there was nothing I cared about more. I hated fighting with him on camera because it felt like I was airing all our dirty laundry. Even then, I knew that couldn’t be good for a relationship,’ she wrote. 

Despite their painful past, Kristin and Stephen have remained friends and will even speak with each other on occasion.   

‘We’re friends. I speak to them from time to time,’ Stephen told Us Weekly in 2018. ‘I’ll go down. Conrad will throw a killer 4th of July party in Laguna, and so I’m usually down there for that. And then, yeah, I’ll speak with Cavallari from time to time. We always just check in and say hello.’

Nowadays, Kristin is back on the market after ending her marriage with former NFL player Cutler, whom she shares sons Camden, seven, Jaxon, six, and daughter Saylor, four, with. 

Stephen, meanwhile, dated actress Chelsea Kane from 2011 to 2013 and Hayden Panettiere from 2006 to 2008. 

The way they were: Stephen, meanwhile, dated actress Chelsea Kane from 2011 to 2013 (pictured 2012)

Flashback: The reality star also dated Hayden Panettiere from 2006 to 2008 (pictured 2006)