As one of the world's most successful female designers, Victoria Beckham was unlikely to turn up at the London marathon in trainers. Despite it being an off-duty day, the 41 year old wore a pair of skyscraper heels to cheer on her son Romeo, 12, in the children's marathon earlier today. She accessorised her skinny jeans, leather jacket and 'Team Romeo' T-shirt with a pair of Alaïa Boots, which retail at approximately £1,500. Scroll down for video . Victoria Beckham at the London marathon today . R13 Kate distressed skinny jeans . Get a similar style at Farfetch! Visit site . Just when we thought we knew Victoria Beckham's sense of style better than our own, she goes and surprises us. We're so used to seeing her in midi skirts and dresses from her own collection that seeing her in a sleeveless wrap top and jeans takes a bit of getting used to. But when it comes to basics, like the rest of us, she has her favorites. She actually has worn these super skinny jeans countless times before, and it's easy to see why. They're by R13, a label loved by A-listers like Lindsay Lohan, Beyoncé and Rihanna and they fit like a dream. When paired with platform ankle boots, VB's legs look like they go on forever! This season, the biggest denim trend has been jeans that are ripped to shreds. But we love this much more subtle approach - look closely and you've notice that these dark wash jeans feature distressed detailing all over. Click the link (right) to buy a similar pair now at Farfetch. But if you want the Beckham look on a budget, check out the edit below for our favorite high street styles. Topshop distressed skinny jeans . Visit site . Asos distressed skinny jeans . Visit site . Citizens of Humanity distressed jeans at Selfridges . Visit site . ASOS Ridley Skinny Jeans in Clean Black with Ripped Knees at ASOS . Visit site . Despite the shoes having an eye-watering six inch heel, the star appeared unhindered and strolled easily around the finishing line with her husband David and her three sons. Victoria is a devotee of huge heels - in her early years  of fame she was never seen without a pair on and once said of flat shoes: 'I just can’t get my head around the footwear.' But recently she admitted in an interview with the Independent that she was now a convert, thanks to her busy lifestyle. She told the newspaper: 'I’m busier now – so I couldn’t totter around in a tight dress and a pair of heels! I think I feel a little more relaxed.' The star wore a pair of Alaïa Boots, which retail at approximately £1,500 . She continued: 'I suppose if I’m being honest, I would have been scared, right at the beginning, to wear lots of layers and to wear a flat shoe. 'I would have been scared to do that. Now I’m not.' But Victoria must find these boots extremely comfortable because she has been wearing them on a number of occasions recently. The Spice Girl wore them for a flight to London from LA last week and she also showcased them during an appearance on the Ellen show last week. Victoria wore the boots when she took a flight from LA to London last week . Victoria also wore the boots for an appearance on The Ellen Show .
Victoria Beckham was at the London marathon to cheer on her son Romeo .
The star wore a pair of Alaïa Boots, which retail at approximately £1,500 .
She was joined by husband David and sons Brooklyn and Cruz .