Kate Middleton Wears White Roland Mouret Gown & Jimmy Choos at Claridge's Hotel: UPDATE

UPDATE: Grazia Daily contacted Roland Mouret on Wednesday morning for his thoughts on dressing Kate Middleton and this is what he said...

'I am absolutely delighted that The Duchess of Cambridge chose to wear my Lombard gown to the Thirty Club annual dinner.  The Duchess has an elegance and timeless beauty that is a breath of fresh air, it is an honour to be part of her journey.' Hear, hear!

08/05/2012: After a day of Met Ball marvels, we thought we were all gowned out for one day then Kate Middleton hit the red carpet and, well, WOW. There’s no way we could let this beauty slip through our fashion net.

The Duke and Duchess of Cambridge arrived at Claridge's Hotel this evening for a black tie dinner where a be-suited Prince William gave a speech to the prestigious Thirty Club. Kate looked ruddy wonderful decked out in a floor-length creamy white gown by Roland Mouret with long sleeves and a thigh-high slit to showcase one very slender leg.

Kate Middleton loves her Jimmy Choo Vamps

And you MUST have a scroll through the gallery above to see her twinkling Princess-worthy platform sandals! Oh yes, fash fans, the nude court shoes are gone and in their place are the same pair of Jimmy Choo Vamp heels (costing £450) that Kate wore to the BAFTA Brits To Watch shindig last summer. Hmm, did Nicholas Kirkwood’s words hit home we wonder? Teamed with a matching metallic clutch and glistening drop earrings, the result is far blingier than we’ve seen from 30-year-old Kate in quite some time. But rather than going J-Lo flashy, K-Middy wisely kept the rest of her look minimal and sophisticated in a Gwyneth-Paltrow-at-the-Oscars stylee with those enviably glossy brunette locks flowing free.

Amber Valetta and Carla Bruni in RM by Roland Mouret

Kate fans were quick to identify this sleek sheath dress as Monsieur Mouret’s Lombarde creation (named after actress Carole Lombard) from the designer's Autumn Winter 2009 collection. Statuesque stars including Amber Valetta and Carla Bruni have previously worn the frock – the now ex-French First Lady chose the chic creation in a jade green tone for a state dinner at the Elysee Palace in March 2010.

And this isn’t the first time our Middleton has chosen to wear a touch of the Mouret either. She wore the London-based designer’s navy Manon dress for the royal trip to Canada in June last year.

So is Kate's gown worthy of a princess? That's for you to decide. In the meantime, don't forget to have a gander at Grazia's Kate Middleton Look Book.