Pippa Middleton splashes around in peach bikini during St. Barts vacation

Pippa Middleton showed off her rock-hard abs in a halter-style peach bikini during her family beach vacation in St. Barts this weekend.

Kate Middleton’s younger sister, 40, was photographed wearing the textured two-piece with gleaming metal hardware as she took a dip in the water with her husband, James Matthews, and their two eldest kids: Arthur, 5, and Grace, 2.

Pippa, who also shares 1-year-old daughter Rose with Matthews, coordinated her swimsuit with an orange-and-white chevron-print cover-up that tied at the waist.

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She also accessorized with round sunglasses and pulled her hair back with a claw clip.

Pippa was seen laughing while splashing around in the ocean with her adorable kids as her hedge-funder husband kicked around a soccer ball in the sand.

At one point, Pippa sweetly held little Grace’s hand as the toddler ventured into the clear blue waves in a frilly pink one-piece.

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Matthews, 48, also flaunted his tanned muscles, going shirtless as he frolicked on the beach in red board shorts. Earlier in the day, he was seen in a casual T-shirt and carried an oversized straw beach bag.

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Pippa had stunned in a bright green bikini from Vix by Paula Hermanny while having a beach day with her family the day prior.

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The British socialite is known for her head-turning physique, and showed off her fit frame in several other swimsuit while vacationing on the ritzy Lake Como, Italy ahead of her 40th birthday last September.

During that same trip, she wore a show-stopping ruffled red gown to a friend’s wedding.

She also wowed in a red-hot two-piece by Heidi Klein last February while celebrating Valentine’s Day in St. Barts, just five months after giving birth to her and Matthews’ third child.

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Pippa famously made headlines back in 2011 when she wore a form-fitting white Alexander McQueen bridesmaid dress to her sister’s wedding to Prince William.

In 2017, Pippa married Matthews — heir to the Scottish feudal title of Laird of Glen Affric — wearing a cap-sleeved lace gown by Giles Deacon.

A Maidenhair fern tiara by Robinson Pelham and satin pumps with pearl accents by Manolo Blahnik completed her bridal look.