Kristin Cavallari is going platinum for the fall.

The former reality TV star debuted her new platinum-blond hair over the weekend, ditching her longstanding dirty-blond locks in favor or a brighter hue.

Kristin showed off her hair Saturday at the 2016 Carousel of Hope Ball in Beverly Hills, Calif., while wearing a light pink Jay Godfrey dress with hip and chest cutouts. Her platinum wavy hair stood out against her perfectly-tanned skin.

All dolled up 💄🍾 #NancyDavisFoundation #CharityEvent

A post shared by Kristin Cavallari (@kristincavallari) on

"All dolled up 💄 #NancyDavisFoundation #CharityEvent," she captioned a photo of her look, shared with her 2.4 million Instagram followers.

Us Weekly reported that her locks were styled by celebrity hairstylist Scotty Cunha, who also shared an image of his star client before her bash.

"LOVE when KC is in town!!!! ❤️❤️❤️," he captioned the same photo that Kristin shared on her social media.

While at the event, the former "Hills" star gushed about family life, saying her best look is that of a mother to her three children -- Camden, 4, Jaxon, 2, and daughter Saylor, 10 1/2 months.

"Being a mom [is when I feel most confident], period," she told Us. "Like, that's when I feel like I really came into my own and became the person that I was always meant to be."

A few hours later, Kristin was headed back to mom life in Chicago, where she lives with her husband, NFL Quarterback Jay Cutler.

"Chi-town #BackToMyBabies ❤️," she said on Sunday morning, captioning a photo from the airplane of the Windy City.

Chi-town #BackToMyBabies ❤️

A post shared by Kristin Cavallari (@kristincavallari) on

And she chose a good time to come back, too. On Monday morning, Kristin shared a photo of her protectively looking and holding her daughter as Saylor curiously steps forward.

My little love! #BabysFirstSteps #StopGrowingPlease 👣

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"My little love! #BabysFirstSteps #StopGrowingPlease 👣," Kristin said.