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If you were blown away by Meghan Markle‘s elegant and regal wedding gown, designed by Clare Waight Keller of Givenchy, you weren’t alone—so was the groom.

Prince Harry quickly sought out the designer during the couple’s lunchtime reception in St. George’s Hall at Windsor Castle to thank her for creating Meghan’s white silk gown.

“He came straight up to me and said, ‘Oh my God, thank you. She looks absolutely stunning,’” Waight Keller told reporters Sunday in Windsor. “I think everybody saw on television he was just absolutely in awe. I think she looked incredible.”

Meghan Markle Givenchy Dress
Credit: Getty Images

The Givenchy designer said that she had the chance to speak to the newlyweds at the lunchtime reception, and said they were completely blissful following the wedding ceremony.

“She was just flowing after the ceremony,” Waight Keller said. “I think it was just such a special moment for the two of them. They are so in love. I was just thrilled to be part of it.”

The design of Meghan’s gown was a complete secret up until the moment Meghan stepped out of her car at St. George’s Chapel. Even Waight Keller’s family didn’t know she was designing the dress until May 19.

“Literally on the morning,” she says of when her family found out. “It was really a secret.”

This Story Originally Appeared On People