Kate Middleton wows in a show-stopping dress

Kate Middleton's show-stopping dress has made an elite media club's private dinner a very public affair.

Kate accompanied her husband to the 'secret' dinner in London last night in a floor-length cream dress with a thigh-high split.

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The 2009 Roland Mouret dress - the same designer Kate wore when she started her North America tour last year - was paired with crystal-studded Jimmy Choo Vamp heels, a statement sparkling clutch, and diamond earrings.

According to the Daily Mail, the dinner is reserved for the elite Thirty Club - a community of powerful media and advertising moguls first established in 1905 - and was held at The Claridge’s hotel in Mayfair, where Prince William was guest speaking in honour of the Queen's jubilee and his 30th birthday next month.

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The club - which has historically hosted media moguls including Rupert Murdoch - often calls upon members of the royal family to speak at their secret dinner meetings, with William's mother Princess Diana and Prince Phillip also previously invited to speak at the event.

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