Remember that scene in Harry Potter and the Philosopher's Stone when Harry puts on that carpet-like invisibility cloak and his whole body disappears from sight?

Well, a real-life scarf version has now been invented and it's sent the paparazzi world into a head-spin.

The Ishu scarf allows the wearer to become unrecognizable when exposed to flash photography from a camera or smart phone.

Creator Saif Siffiqui told Fairfax Media: 'The tech behind the Ishu ensures pictures black out.'

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'The application possibilities are endless including working with museums and art galleries where flash photography is prohibited as well as working with luxury venues on interior design such as [private members club] Soho House where pictures are not allowed,' he added. 

Watch how it works: 

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The monochrome patterned scarf is becoming a firm favorite among celebrities with stars such as Cameron Diaz, Winnie Harlow, Paris Hilton and Nick Jonas all sporting the accessory.

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However, anonymity comes at a price with the scarf retailing from £289. 

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Saif came up with the scarf, which works the same was a high-vis, after his friends tried to take a picture of him on a bike in Amsterdam.

'The reflector ruined the picture and I thought how cool it would be to be able to wear or hold something which can ruin a picture completely.' 

Pure genius.