Anna Wintour reveals the Met Gala 'cardinal sin' she's committed - as she ... trends now

Vogue's legendary editor-in-chief Anna Wintour is letting fashion fanatics in on the behind-the-scenes of the Met Gala as she revealed why this year's event broke her one 'cardinal rule.'

The 74-year-old magazine executive also confirmed the foods she had banned from the dinner menu.

Wintour divulged the secrets just days before the Met Gala in a sit-down interview with Today host Jenna Bush Hager, filmed from the Metropolitan Museum of Art's Restoration Lab.

The star-studded event is an annual fundraiser for the Metropolitan Museum of Art's Costume Institute in Manhattan, led by Wintour since 1995. 

Tickets cost a whopping $75,000 each, according to CBS News. 

The gala always has a creative and whimsical theme, which celebrates the grand opening of the new spring exhibition beginning at The Met.

But Wintour admitted that this year's theme, which marks the Costume Institute's new exhibition, 'Sleeping Beauties: Reawakening Fashion,' brought some confusion. 

'This exhibition broke my cardinal rule, Jenna, which is when we came up with the title Sleeping Beauties, it's wonderful and poetic and romantic, but it actually could be many, many things,' Wintour explained.

She said that with the help of Andrew Bolton, the curator of the Met's Costume Institute, they came up with 'Garden of Time' as the official dress code.

'I fear that we've unleashed a lot of confusion out there for which I deeply apologize, but I imagine we'll see a lot of flowers,' Wintour shared.

She also broke her silence on the long-standing rumor that she had banned onions, chives, and garlic from the gala's dinner menu. 

'Well, those are three things I'm not particularly fond of, and so yes, that's true,' Wintour told Hager.

The global director of Vogue even spoke a bit about her strict no cell phone rule, which requires all guests to leave their mobile devices at home and enjoy each other's company.