How’s that for a birthday suit?

After celebrating her 30th birthday on Friday, Bella Hadid shared an Instagram carousel late Sunday night showing off her custom red string bikini for the occasion, complete with a white “30” on the chest and her name spelled out atop a star on the back of the skimpy bottoms.

The suit was custom-made by Los Angeles-based swim brand Baben.

“Hi my name is bella and I’m 30,” Hadid captioned the photos.

Over the two-piece, Hadid layered a red striped apron dress from Sororité Vintage — a piece previously worn by Carrie Bradshaw in Season 6 of “Sex and the City,” no less — and pulled on tan cowboy boots in a nod to her love of all things equestrian.

A jumble of gold pendant necklaces and beaded bracelets completed the laid-back look.

Hadid spent the milestone weekend at Blackberry Farm in the Great Smoky Mountains of East Tennessee with a group of around a dozen friends, including pals Fanny Bourdette-Donon, Rachael Ryan Lacy and Yasmine Diba. Other snaps showed the crew molding clay, cruising in a golf cart and sipping wine.

“Best weekend celebrating our favorite girl,” Bourdette-Donon wrote on her Instagram Stoies.

On Sunday, Hadid also posted photos of herself in a feather-trimmed dress in the sun-dappled forest, thanking “all who made me feel so loved, sent well wishes, thoughts, flowers, notes” on her big day.

“I am in gratitude to God, my loved ones, my loyal and amazing supporters who have stood by me, and everyone who sent me blessings for another year around the sun,” she wrote. “I am so so so lucky.”