Sarah Burton successfully pulled off fashion's best-kept-secret.

The creative director of Alexander McQueen kept it hidden from the world - literally, the entire world - that she was the blessed one chosen to design Kate Middleton's wedding dress.

She discusses the excitement, and the anxiety, in the December issue of British Vogue, on sale Nov. 3.

It was so great to actually keep a secret, especially in this day and age when everyone talks about everything, said the 37-year-old.

The only others ones privy to the information were a group of colleagues who would be helping her with the design.

Because my core team knew, it was okay for me to disappear and then come back, and then disappear again. But I remember other people asking me, 'Are you coming in on Friday?' And I'd say, 'Oh, yeah, see you in the morning'. I'd be scheduling meetings knowing full well I wasn't going to be there for them, she said.

Not even Burton's parents knew (they found out on the eve of the ceremony).

The gown has been hailed as one of Burton's greatest masterpieces. It was made of ivory satin and featured a delicate lace applique bodice and skirt. The train measured 110 inches.

Acclaim is rightfully given. Middleton was truly an ethereal vision as she glided down the aisle on April 29, 2011.

I remember standing in Westminster Abbey thinking, 'This is unreal'. It was like a fairy tale. And all I could think was, 'I hope I don't trip over'. I didn't realise the enormity of it until much nearer the wedding day. It was a magical experience, she said.

Middleton hand-picked Burton as her designer, with a report coming out in the Sunday Times before the wedding that, A fashion source said that the dress will be a combination of Middleton's own design ideas and Burton's deep knowledge and understanding of high fashion.

Prior to ceremony, Burton denied any involvement in the design.

However, she worked closely with Middleton every step of the way to develop a creation that adhered to both regal tradition as well as the unique artistic vision of Alexander McQueen.

Karl Lagerfield told France 2 Television, The dress is classic and goes very well in the Westminster decor. It almost reminds me of Elizabeth's wedding, the royal weddings in the [19]50s. The proportion of the train is good. The lace is very pretty. I like the veil a lot.

Burton took over as creative director for the Alexander McQueen label after the designer himself committed suicide in February 2010.

His eclectic, warped vision helped him to develop one of the most outstanding and distinguished fashion houses the world has ever known.

I definitely considered not taking this job. I was at such a loss, he was such a huge part of my life, my every day. I could finish his sentences but I didn't know that I could begin anything, and that terrified me, she recalls to Vogue.

She believes that getting chosen as the designer for Middleton was a gift, a blessing, from McQueen. Out of such terrible, tragic times and from under this dark cloud came that dress.

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