The Parisian designer was only born in 1990, but he is already leaving a huge mark on the industry with his playful and conceptual takes on French classics, Instagram-friendly knitwear and deconstructed tailoring. If you've looked at any street style imagery from the last 12 months, you will almost certainly have seen Jacquemus's creations, as the likes of Alexa Chung, Tamu McPherson and Taylor Tomasi Hill are all big fans. Rihanna even wore a pair of the wide-leg statement trousers to meet Prince Harry.