Her not-so little boy! Victoria Beckham shares sweet snap cuddled up to strapping son Brooklyn

By Rebecca Lawrence For Mailonline and Mike Larkin For Dailymail.com

Published: 07:22 GMT, 9 August 2016 | Updated: 14:57 GMT, 9 August 2016

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He'll always be her little boy.

But Victoria Beckham, 42, realised just how fast her eldest son was growing up as she shared a snap of her strapping young son on Instagram on Tuesday.

Towering over her, 17-year-old Brooklyn proved he was taking after his father David in the height stakes as she joked about how tiny she looked in comparison.

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Two of a kind: Victoria Beckham, 42, realised just how fast her eldest son was growing up as she shared a snap of herself dwarfed by her strapping young son Brooklyn, 17, on Tuesday

Cuddled up together in a sweet black and white snap, the designer quipped: 'I had no idea I was so short X Special family time X Kisses @brooklynbeckham @davidbeckham X VB.'

Cuddled up together, 5′ 4″ Victoria looked effortlessly chic in a loose fitting vest and denim hotpants, donning a trucker cap and signature oversized shades as she pouted for the camera.

Meanwhile, Brooklyn looked the spitting image of his footballer father as he showed off his gym-honed arms in a vest and tracksuit bottoms.

On level footing! Victoria - famed for her love of heels - can almost reach her eldest son's height when she dons a pair of trusty stilettos

Whilst Brooklyn undoubtedly takes after his dad, David revealed that his youngest son Cruz is rather similar to his popstar mother.

Posting a clip of the 11-year-old showing off his dancing skills on Monday, the third child of the couple's four seemed to have picked up a thing or two from Spice Girl Victoria.

Proud David, utilising his knowledge of football nicknames, captioned the video: 'Come on Cruzie.'

Wannabe dancer: David's son Cruz showed off his moves in an Instagram video on Monday

No doubt Victoria got a lump in her throat when she saw her boy showcasing his unique dance floor capabilities.

The youngster, who was wearing trendy sportswear and a baseball cap, showcased his best moves, with perhaps the most notable stylistic flourish being his use of an invisible stick in his right hand, which he waved it around with wild abandon.

Of course Cruz should be expected to be something of a natural on the dance floor, given he is a descendant of British pop royalty.

More moves than you can shake a stick at: His most audacious stylistic flourish was his judicious use of an invisible branch, which he waved around with aplomb

Monday night diva: He proved to be something of a natural when it comes to zany dance steps

Stop If U Can't Dance: But Cruz seemed to be having a great time as he continued his routine

Victoria shot to worldwide fame in 1996 as a member of record-breaking group the Spice Girls.

Nicknamed Posh Spice, supposedly due to her 'refined attitude' and love of designer clothing, she achieved a string of number ones with the band, though she primarily served as a backing singer.

The Spice Girls have sold more than 80 million records around the globe, making them the best-selling female group of all time and one of the best-selling bands of all time

Spicing up David's life: The former footballer was no doubt lapping up the action

Old Spice: Victoria with the girls during The Return Of Spice Girls Word Tour in 2007

The spice boys: Victoria posing with husband David and sons Brooklyn, Cruz and Romeo. The couple also have a five-year-old daughter named Harper Seven