Heidi Klum and Tom Kaulitz wed in 2019 (Picture: Instagram/@heidiklum)

Heidi Klum marked her and husband Tom Kaulitz’s four-year wedding anniversary on Wednesday with a seriously romantic photo.

The 49-year-old runway star didn’t appear to be wearing a stitch as she wrapped her arms around Tokio Hotel guitarist Tom, 33.

Above the stars, a wave of heart-shaped balloons lined their home’s ceiling and Heidi sweetly captioned her Instagram post: ‘Love of my life.’

The supermodel and her musician beau wed during a secret 2019 ceremony that took place less than a year after they started dating.  

Months later, the couple celebrated with a blow-out wedding celebration in Italy while surrounded by family and friends.

Doting mum Heidi also posted a snap of a cake that was stamped with the words ‘four years’ and an achingly adorable clip of her and Tom smooching.  

The 49-year-old runway star didn’t appear to be wearing a stitch as she wrapped her arms around Tokio Hotel guitarist Tom, 33 (Picture: Instagram/@heidiklum)

Heidi was also seen smooching her husband (Picture: Instagram/@heidiklum)

Heidi found love with Tom in 2018.

‘I’m just a much happier person,’ she told People in January 2020. ‘For the first time, I have a partner who I can discuss everything with. Someone who shares duties that we all have in our life.

‘I used to be on my own with everything. For the first time, I get to experience what it is actually like to have a partner.’

Heidi found love with Tom in 2018 (Picture: Neilson Barnard/Getty Images for The Recording Academy)

Heidi and Tom announced they were set to marry on Christmas Eve in 2018.

The America’s Got Talent judge previously said her children were there when Tom popped the question.

She shares daughter Leni, 18, with former partner Flavio Briatore, and with her ex-husband Seal shares her second daughter Lou, 13, and sons Henry, 17, and Johan, 16.

It comes after Heidi revealed that her dad actually filmed her while she was giving birth.

Appearing on the Jennifer Hudson show this month, the star opened up about her family life with the youngsters, and shed light on how close her family are.

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When the host asked whether she has their births on camera, Heidi explained that her father was actually the one in charge of capturing the footage.

‘My dad actually filmed it,’ she said. ‘I know that probably sounds strange but my parents were all there when I gave birth to my kids.’

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Romance was certainly in the air.