Duchess Catherine has been named the fourth best dressed woman in the world by Glamour magazine.

The royal - who will celebrate her first wedding anniversary on Sunday (29.04.12) - was praised for her "classic elegance which has set the high street alight", as she made her debut on the list topped by the 'Twilight Saga's Kristen Stewart.

The magazine said: "The Duchess of Cambridge's classic elegance has set the high street alight, causing both Zara and Reiss to sell out of her favourite pieces."

However, Catherine's sister Pippa didn't fare quite as well, only making it to number 47 in the poll, voted for by Glamour's readers.

Kristen was praised for her "effortlessly on-trend" style with the publications stating: "Whether she's working bodycon Monique Lhuillier on the red carpet, or dressing down in jeans and a T-shirt, Kristen is always effortlessly on-trend. Her evolution from awkward teen to style queen has made the Twilight star a fashion icon every girl can relate to."

Emma Watson, Victoria Beckham, Florence Welch, Michelle Williams, Blake Lively, Cheryl Cole, Olivia Palermo and Rihanna make up the top 10.