Suns out, buns out.

Heidi Klum is enjoying la dolce vita this week while vacationing in Italy with husband Tom Kaulitz — and her sexy swimwear definitely turned up the heat on Instagram.

“Vacanza romantico ❤️????????” the 50-year-old supermodel captioned a series of sunny snaps on a boat this morning, adding a second post titled “AMORE ❤️” and tagging her rocker hubby, 33.

In the pics, Klum wears a black Versace bikini top ($250) with its “Greca” motif printed on the crisscross straps under the bustline, pairing it with a coordinating bottom ($225) that showed plenty of booty.

The “America’s Got Talent” judge shaded herself from the sun with a pair of oversized black Dolce & Gabbana sunglasses and a trucker hat from DJ Tiësto’s Las Vegas show, adding several layered necklaces and gold bracelets to her look.

As for the Tokio Hotel guitarist, he went shirtless in the snaps, wearing a pair of patterned black swim trunks and a small pair of mirrored shades along with three stacked bracelets, including a Cartier Love Bracelet ($7,350).

The pair — who secretly married in 2019 — seemed to be having a blast as they took turns driving the boat, posing for a few loved-up selfies as they cruised along the Italian coast.

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Along with being a fun vacation destination, Italy holds a special meaning for the couple as they held their second wedding ceremony on a yacht in Capri.

The PDA-happy pair — who made out on a yacht in France last month — also visited Venice last week while Kaulitz (and Klum herself) cradled her stomach on multiple occasions as they strolled the city.

Who knows what the rest of their Italian sojourn will bring, but we suspect there will be some more bikini moments in store.