Heidi Klum wants to marry Vito Schnabel.

The 42-year-old model, who split from ex-husband Seal in 2012 after seven years of marriage, is reportedly hoping to walk down the aisle with her 29-year-old beau in the near future.

A source close to the blonde beauty said: ''Heidi is obsessed with him.

''She's totally serious about marrying him.

''She says he's an old soul and great with the kids, so why not make it official.

''No one will be surprised if they're engaged soon ... Heidi has never been good at being alone.''

The German beauty declared her love for Vito on Instagram last month, while wishing him a happy birthday.

Alongside a photo of them acting silly together, she wrote: ''I love you my V. HAPPY BIRTHDAYY. (sic)''

Heidi recently admitted she thinks about Vito, who previously dated Demi Moore and Elle Macpherson, during her lingerie photo-shoots.

She told US OK! magazine: ''I remember when I first started shooting swimwear and lingerie, and the advice photographers always gave me was to not over-pose.

''No overarching, duck faces or strange poses so it doesn't look like you are trying too hard. Even though [photographer] Francesco Carrozzini is behind the camera, I look into the lens and I think about my boyfriend.''