Britain's Duchess of Cambridge was flying the flag for Britain yesterday as she stepped out in a blue dress and hooped necklace.

The stunning style icon gave a double nod to her home country's London 2012 Olympics hosting with her choice of electric blue shift dress by British designer Stella McCartney.  

The brunette beauty accessorised with a hooped gold necklace.

According to British newspaper The Daily Mail, Catherine "thought it appropriate to wear it today given the Olympic theme."

The royal completed the chic look with black Prada heels.

Appearing at the National Portrait Gallery for the unveiling of Olympic-themed gallery Road to 2012: Aiming High exhibition, Catherine impressed onlookers with her usual chic appearance.

The star has built a reputation for being an avid fan of home-grown design talent. Her wedding dress was designed by Alexander McQueen creative director Sarah Burton and became such a hit with the public that over 620,000 people visited the dress while on display at Buckingham Palace.

The increased ticket sales from the legions of fans wanting a closer look at the dress raised £10 million for charity.

"Unprecedented numbers came to see the Duchess' wedding dress, as the centrepiece of a special display celebrating the role of British design," director of the Royal Collection Jonathan Marsden told British newspaper The Evening Standard recently.