London just held its answer to the Met Gala, and precisely no one even knew it was happening.

It looks like Anna Wintour's assistant forgot to tell the world there was going to be an extravagant, star-studded red-carpet event in London this week. 

Because apparently it's taking place now – and it's called Vogue World.

On Thursday local time, Vogue hosted its second annual Vogue World event. Last year, it took place in New York City, while this year it's in London – kicking off London Fashion Week with a swanky event at Theatre Royal Drury Lane.

US and UK editors Anna Wintour and Edward Enninful are hosting the event, while Stormzy, FKA twigs, Sienna Miller (?) and James McAvoy (??) are among those performing.

And while many of us weren't even told the event was happening, it looks like the celebs weren't told the dress code, either.

Sienna Miller

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Nicola Coughlan 

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Jodie Turner-Smith

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Anna Wintour, Edward Enninful and Baz Luhrmann

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Kate Winslet

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Jared Leto and Shannon Leto

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Cole Sprouse

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Poppy Delevingne, Stella McCartney and Carey Mulligan 

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Princess Eugenie 

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Princess Beatrice and Edoardo Mapelli Mozzi 

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Winnie Harlow

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Georgia May Jagger

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Simone Ashley

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Maude Apatow

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Emilia Clarke

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Maisie Williams

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Twiggy

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Dove Cameron

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Alexa Chung

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Nathalie Emmanuel 

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Charlotte Tilbury

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Daisy Edgar-Jones

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Rita Ora

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Gemma Chan

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Feature image: Getty.