Heidi Klum, 51, goes TOPLESS for beach day with thong-clad model daughter Leni, 20, and husband Tom Kaulitz, 34, on sizzling Sardinia break

Heidi Klum went topless for a sizzling day on the beach in Sardinia, Italy.

The runway icon enjoyed a beautiful day by the ocean with her husband Tom Kaulitz, 34, and daughter Leni, 20, on Tuesday.

The bikini top was gone and Heidi raised the temperature as she sat topless on an easy chair next to her husband.

Her daughter wore a colorful thong bikini as she put on a sweet show with her boyfriend Aris Rachevsky.

While she was more covered up, Heidi, who celebrated her 51st birthday earlier this month, wore a semi-sheer mustard yellow robe as she cuddled up to her husband.

Heidi Klum enjoyed a beach day in Sardinia, Italy with her husband Tom Kaulitz, 34, and daughter Leni, 20, on Tuesday

Her daughter Leni wore a colorful string bikini

Her daughter Leni wore a colorful string bikini

The couple looked oh so in love as they cuddled on their chairs and looked at each other lovingly.

As they strolled along the sand together, Tom wore both of their sandals while Heidi gently rested a hand on his shoulder.

The catwalk queen added a touch of glamor to her beach look with a gold necklace and studded earrings.

Tom looked fashionably beachy in a light blue button-down that was partially unbuttoned, teamed with flowing trousers and a backwards cap.

Meanwhile, Leni also enjoyed a bit of sunbathing while lounging on a lounge chair.

Her brunette hair was up in a loose bun and she shielded her eyes with a pair of fashionable sunglasses.

The model packed on the PDA with her boyfriend as they approached the water, climbing on several oceanfront boulders.

She went topless as she relaxed on a lounge chair next to her husband

She went topless as she relaxed on a lounge chair next to her husband

The star added a touch of glamor to her beach look with a gold chain and fashionable sunglasses

The star added a touch of glamor to her beach look with a gold chain and fashionable sunglasses

She also wore a mustard yellow robe and carried a beach bag

She also wore a mustard yellow robe and carried a beach bag

The couple, who married in 2019, shared a kiss

The couple, who married in 2019, shared a kiss

Heidi snuggled up to her husband as she wrapped herself in a towel

Heidi snuggled up to her husband as she wrapped herself in a towel

Kaulitz wore a blue button-down, pants and a cap

Kaulitz wore a blue button-down, pants and a cap

She showed off her incredible figure in a floral print bikini

She showed off her incredible figure in a floral print bikini

Klum beamed with happiness as she stood on the beach

Klum beamed with happiness as she stood on the beach

The couple enjoyed some quality time in the sun together

The couple enjoyed some quality time in the sun together

Leni was joined by her boyfriend Aris Rachevsky for the beach day

Leni was joined by her boyfriend Aris Rachevsky for the beach day

Heidi has been married to Tokyo Hotel rocker Tom since 2019.

Since Heidi is 16 years older than her husband, the age difference between the two has made headlines before.

‘I’m 50 and no longer twenty. “I’m not a young girl who hasn’t experienced anything or has no idea about life,” she acknowledged Glamor Britain last year.

‘For me, time does not stand still and Tom will never catch up with me. I will always be sixteen years older, and I am aware of that,” Heidi continued.

‘I know I’ll look older than him sooner. Maybe in ten years it will be a problem for me, maybe he won’t like it then,’ she thought.

The star wore her brunette hair in a messy bun

For the beachy occasion, she wore a necklace and anklet

The star wore her brunette hair in a messy bun

Leni follows in Heidi's footsteps as a model and shared her first magazine cover - Vogue Germany - with her mother in 2020

Leni follows in Heidi’s footsteps as a model and shared her first magazine cover – Vogue Germany – with her mother in 2020

The 20-year-old relaxed on an easy chair

The 20-year-old relaxed on an easy chair

She put on a loving display with her love

She put on a loving display with her love

The couple stood along the water

The couple stood along the water

They relaxed on boulders by the waves

They relaxed on boulders by the waves

Heidi's wife wore their shoes

Heidi’s wife wore their shoes

‘In twenty years I will be seventy. I usually make plans for the future, but together with my husband I live in the here and now.’

She was previously married to singer Seal from 2004 to 2015 and to hairstylist Ric Pipino from 1997 to 2002.

The mother of four shares Leni with her ex, Italian businessman Flavio Briatore, and sons Henry, 18, Johan, 17, and daughter Lou, 14, with Seal.

Leni follows in Heidi’s footsteps as a model and shared her first magazine cover – Vogue Germany – with her mother in 2020.

She has since signed with IMG Models and collaborated with GHD, Dior and Intimissimi with Heidi.