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It's been over six years since Kate Middleton and Prince William‘s wedding, but no one can stop talking about her gorgeous Alexander McQueen gown. And now, one of the dressmakers is spilling on what it was like to make the legendary dress — and the difficult task of keeping the look secret until the big day.

Mandy Ewing called being on the dress-making team a "once in a lifetime opportunity" after a recent visit to the Royal School of Needlework by Camilla, Duchess of Cornwall, according to Hello!

"We knew who it was for, but it was very secret — we had net curtains up and cleaners were not allowed into the room and the code on the door was changed," Ewing said. "The dress was all in the news, but nobody knew who was doing it. When you're working you just focus on it and try not think about what's in the news. But it was an exciting event and everybody loved working on it — it was a once in a lifetime opportunity."

During her visit to the school, Camilla tried her hand at embroidering but joked that she would "leave it to the experts."

Sarah Burton, the creative director of Alexander McQueen who also designed Princess Kate's shoes and veil for the royal nuptials, opened up about being tapped to create the iconic gown in a 2014 story for T Magazine.

"Some people think … that I'm afraid to speak up about the happy experience I had creating the Duchess of Cambridge's wedding dress, but I can tell you that is nonsense. I have never been a shrinking violet or a person who is ruled by fear," she said. "I loved making the dress … and we put our hearts into it. I respect the intimate nature of that lovely project and I respect the friendships that were forged during it … An instinctive, intelligent, imaginative young woman's wish for a beautiful wedding dress — or any kind of dress — is the most natural thing in the world. And I was honored to pick up the challenge and always will be."

Though Burton said she's "pretty shy," there was no hiding on the wedding day.

"I had no idea it would be as big as it was," she recalled. "Only the night before, seeing all the photographers outside the abbey, did I think, ‘Oh, my God. This is massive.' "

This Story Originally Appeared On People
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