Heidi Klum, 51, and daughter Leni, 20, sizzle in bikinis while on vacation in Sardinia with their partners

The models are heating up the beach.

Heidi Klum and her mini-me daughter, Leni Klum, flaunted their fit figures in tiny bikinis while on a family vacation in Sardinia, Italy, with their respective partners this week.

In photos obtained by Page Six, they could be seen taking a dip in the picturesque Mediterranean Sea at the luxurious Hotel Cala di Volpe and getting flirty with their men.

Heidi, 51, wore a fun orange, purple and yellow bikini with a leaf pattern. She shaded her face from the sun with a beige baseball cap and sunglasses.

Heidi Klum stunned in a colorful bikini during a vacation with her mini-me daughter, Leni Klum, in Sardinia, Italy, this week. BACKGRID

She was also seen packing on the PDA with her husband, Tom Kaulitz. BACKGRID

They held hands and kissed while swimming in the Mediterranean Sea. BACKGRID

Kaulitz sported a neon green swimsuit. BACKGRID

The former Victoria’s Secret Angel was photographed holding hands and kissing her husband, Tom Kaulitz, in the water. He was hard to miss, as he sported neon green swim trunks.

Leni, for her part, sizzled in a white bikini with red lining. The 20-year-old was seen playfully lying on top of her beau, Aris Rachevsky, and kissing him on a lounge chair. They also took a plunge into the water.

The pair, who has been dating for more than a year, was spotted making out in the water last weekend as well. They smooched on land, too, as they hugged while wrapped in a blue towel.

Leni, meanwhile, showed off her assets in a white bikini that featured a red lining. BACKGRID

She also showed off some PDA with her longtime beau, Aris Rachevsky. BACKGRID

She heated things up when she climbed on top of him on a lounge chair on the beach. BACKGRID

They passionately cuddled and kissed. BACKGRID

For last week’s excursion, Leni stunned in a maroon string bikini.

Heidi was also there soaking up the sun with Kaulitz, 34, and shared some selfies from their lengthy Italian vacation.

It’s no surprise the mother-daughter duo decided to vacation together, as they’re super close.

Last month, they twinned in feather dresses at the 2024 amfAR Gala Cannes afterparty in Cap d’Antibes, France.

The group has been vacationing together for at least a week. BACKGRID

Leni and Rachevsky showed off their love last Saturday as they made out on the beach. BACKGRID

They also enjoyed a months-long lingerie campaign with Italian fashion brand Intimissimi last year.

In June 2023, the “America’s Got Talent” judge gushed over her daughter’s ability to grow her career while being a full-time student.

“I’m very proud of my daughter and her modeling,” she said. “And she’s studying at the same time, she’s juggling already.”