Introducing the woman who knows what you'll wear next year

It would be hard to find a "fashionista" who less fitted the image of Mireille Guiliano's 2005 bestseller about eternal "Parisienne" chic, French Women Don't Get Fat, were it not for the fact Emmanuelle Alt is as thin as a whippet.

She doesn't carry the habitual front-row "accessory" - a bottle of l'eau minerale. "I don't like water. I drink Diet Coke." Nor does she smoke, or drink alcohol or even sip a cafe.

The rhetorical question matches Alt's drole, self-deprecating sense of humour. Smart? She has it sewn up, and is as sharp as the razor-heels on her favourite Giuseppe Zanotti ankle boots.

Alt, 43, has epitomised rock 'n' roll style reborn for the last decade. She is as far-removed from the groomed, coiffed, manicured and maquillaged image of The Devil Wears Prada as Venus from Mars - although her son Antonin, 14, subscribes to American Vogue editor-in-chief Anna Wintour's love of tennis and could probably take her to match point.

Alt is rarely seen in a skirt. Her "uniform" is skinny jeans, from J. Brand, Acne or, her favourite, Topshop - "they have the best".

She wears them with T-shirts, cashmere sweaters from Ralph Lauren or Prada, a Balmain jacket, a vintage fur, and those spike-heeled boots. Nonchalant, cool chic is the Alt attitude.

She inherited her fashion savvy, as well as her height, gazelle-legs and camera-ready looks from her mother Francoise, a Lanvin and Nina Ricci model in the 1960s and 1970s.

"When she stopped modelling, we would go to fashion shows together. My first was Jean Paul Gaultier when I was 19. It was crazy. I loved it."