Kate Hudson, 46, bares her rock-hard abs in tiny bikini on Ibiza beach with lookalike daughter Rani, 6

It’s sun’s out, buns out for Kate Hudson.

The “How to Lose a Guy in 10 Days” star bared her beach bum and toned abs in a cheeky brown bikini, as she celebrated the Fourth of July at the Casa Jondal in Ibiza, Spain, on Friday.

She styled her swimsuit ensemble with a red patterned sarong, a tan sun hat and a matching tote bag.

Hudson’s fit physique is due to years of a lot physical activity.

In 2015, the “Bride Wars” star revealed that she had changed her workout regimen to feature “more aggressive activities like TRX and boxing.”

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“It’s not just about trying to look good physically, it’s important to get oxygen to my brain and feel like my blood is really circulating,” she told Shape Magazine at the time. “I love skiing, walking, hiking and especially riding my bike. It makes me feel like I’m a kid again.”

Hudson’s Spanish vacation was a family affair, as she brought her young daughter, Rani, out to enjoy the waves with her.

The 6-year-old — who’s been known to copy her mom’s style — looked like the “Running Point” star’s mini-me as she color-coordinated in a brown animal print two-piece swim set.

The family appeared to be enjoying their beach day, as they were seen hopping in and out of the water.

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Aside from her daughter, Hudson’s famous friend Dakota Johnson also joined the fun. She matched the duo’s brown trend in a dark brown bikini, which she kept hidden under her light tan cover up.

The pictures come soon after Hudson was seen split from her longtime fiancè Chris Martin.

On Tuesday, Johnson was pictured flaunting her fit bod in a tiny white bikini while yachting with the “Almost Famous” star.

She sported a white triangle top with low-rise and cheeky bikini bottoms at the time, which she accessorized with a beaded necklace and oversized sunglasses.

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Hudson, meanwhile, styled herself in a frilly yellow bikini embroidered with red cherries for that outing.

The stars, who were also joined by the “Fool’s Gold” star’s longtime stylist Sophie Lopez, were seen casually sipping on water while aboard the massive luxury boat.

At one point, they even went for a swim in in the Mediterranean Sea.