High street style: The Reiss Peacock dress that Kate wore to the Epsom Derby was another instant sell-out. Photos:PA/JohnLewis
Kate Middleton - sorry, Catherine Duchess of Cambridge - made her race day debut at Epsom Derby over the weekend, and once again her high street style prompted another sell-out frock.
The new royal wore another dress from one of her favourite high street stores, Reiss, for the day - which became an instant sell-out as soon as it was identified.
The Duchess, teamed the chiffon 'Peacock dress' - which retails at £195 - with a cream tweed Joseph jacket, a taupe fascinator, nude LK Bennett heels and a gold box clutch - also from LK Bennett.
Her hair was pulled back into an elegant chignon, while make-up was kept natural, and added a touch of sparkle with Kiki McDonough droplet earrings.
Her Reiss frock follows on from the nude 'Shola' bandage dress which she wore to greet the Obamas at Buckingham Palace recently - which prompted a flood of people to crash the Reiss website.
Click on the gallery below to see our pick of Kate's perfect 10 style moments:
The Perfect 10: Kate Middleton
Kate poses with her future husband at St. James' Palace after announcing the engagment. The bride to be looks gorgeous in a royal blue Issa dress.
The Perfect 10: Kate Middleton
Kate dresses up in her staple sophisticated style to watch William in the Sovereign's Parade at Sandhurst back in 2006.
The Perfect 10: Kate Middleton
Kate supports William as he graduates from RAF Cranwell in 2008.
The Perfect 10: Kate Middleton
Another royal enagement, another formal outfit. Kate wears a chic suit and a hat adroned with feathers at the Order of the Garter service in 2008.
The Perfect 10: Kate Middleton
Party style! Kate opts for something a little different as she attends a charity roller disco in London.
The Perfect 10: Kate Middleton
The happy couple attend their friends' wedding in Gloucestershire. Kate opts for a sleek blazer and completes the look with a dramatic hat.
The Perfect 10: Kate Middleton
The future princess sports another stunning wedding outfit.
The Perfect 10: Kate Middleton
Kate pulls off country chic in this tweed ensemble at the 2007 Cheltenham Gold Cup.
The Perfect 10: Kate Middleton
Kate looks lovely in cream at the wedding of Laura Parker-Bowles in 2006.
The Perfect 10: Kate Middleton
She dresses down in a pretty summer dress and a pair of wedges for a day at the polo in Richmond.