Kate, 30, came first in a ranking of stunning celebrities including Kelly Brook, Cheryl Cole and her own younger sister Pippa, a poll of 1,000 Brits found.
The British royal won because of her English rose looks and glossy chestnut locks - usually blow-dried into big, bouncy curls - and well-groomed fuller eyebrows, a look copied by thousands of women.
Recently, Kate's pale grey dress by Beulah London with a draped head scarf had evoked memories of Princess Diana as she and Prince William made their first ever visit to a mosque in Malaysia.
She was followed by 'This Morning' presenter Holly, 31 who made headlines with a Twitter without make-up snaps earlier this year. Actress Keira Knightley was third, with model Kelly in fourth and Olympic champion Jessica Ennis in fifth. Kate's sister Pippa managed the bottom spot in the top ten compiled by skincare company St Ives.