Heidi Klum reveals she was pregnant during 2003 Victoria's Secret show

Heidi Klum paid tribute to her eldest child, daughter Leni, on Tuesday as the aspiring model turned 17.

In an Instagram post, the German-born supermodel, who shares Leni with ex-husband Seal, shared a clip of herself strutting her stuff on the Victoria's Secret catwalk in 2003. 

In her birthday message, the America's Got Talent judge revealed she was pregnant at the time - despite displaying a very flat tummy in her .

Model moments: Heidi Klum paid tribute to her eldest child, daughter Leni, on Tuesday as the aspiring model turned 17. Klum shared an older clip of herself on the runway in 2003

Model moments: Heidi Klum paid tribute to her eldest child, daughter Leni, on Tuesday as the aspiring model turned 17. Klum shared an older clip of herself on the runway in 2003

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'Happy 17th birthday LENI, I am not alone walking down that catwalk here. If I look close enough then I can see you bumping right along at 4 months @LeniKlum.' Klum, 47, wrote.

'I loved you before you were born, and I will love you long after I close my eyes forever. ❤️❤️❤️' the devoted mom added.

Last month Leni landed her first-ever solo magazine cover. 

The teen has followed in her supermodel mom's footsteps by gracing Glamour Germany's 20th anniversary issue, two decades after Heidi became the magazine's first cover model. 

Expecting: In her birthday message, the America's Got Talent judge revealed she was pregnant at the time - despite displaying a very flat tummy in her lingerie

Expecting: In her birthday message, the America's Got Talent judge revealed she was pregnant at the time - despite displaying a very flat tummy in her

Bump: Heidi was pregnant with her first child while dating Formula One boss Flavio Briatore - who she split from before Leni was born

Bump: Heidi was pregnant with her first child while dating Formula One boss Flavio Briatore - who she split from before Leni was born

Alongside the cover, which sees her rock a bold floral gown, Heidi's lookalike daughter wrote on Instagram: 'Thank you to everyone who made my first solo cover so special. It's an honor to share this with my mama @heidiklum who was Glamour Germany's first ever

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