When stars like Cara Delevingne, Julianne Moore, and Lily-Rose Depp stepped out to celebrate Chanel's Mademoiselle Privé exhibit, they gave Paris Fashion Week's airport runway show [1] a run for its money.

Karl Lagerfeld's #squad walked the red carpet in the most glamorous looks, ranging from bejeweled dresses to classic tweed suits, and they snapped Instagrams all night long — but that's only the half of it. Inside London's Saatchi Gallery [2], gorgeous Chanel designs were on display, including high jewelry from the 1932 Bijoux de Diamants collection and the Kaiser's signature handmade couture.

Read on see what everyone wore to the jaw-dropping exhibit the fashion world won't be able to stop talking about [3]. With vintage Chanel slot machines lining the walls and holograms of the late Coco herself [4], we don't blame them.

Karl Lagerfeld's Muses Walked the Red Carpet

Cara Delevingne

Vanessa Paradis

Lily Collins

Lily-Rose Depp

Lily Allen [5]

Poppy Delevingne

Stella Maxwell

Georgia May Jagger

Edie Campbell

Alice Dellal

Daisy Lowe

Anja Rubik

Clémence Poésy

Jamie Bochert

Leigh Lezark

Jemima Kirke

Julianne Moore

Lily-Rose Depp Stole the Spotlight

She posed with her BFF, Stella Maxwell, captioning her photo, "Go besfriend thas my besfriend #mademoiselleprive."

And Cara Delevingne, too.

Karl's Tweed Suit Jacket Was on Point

The Haute Couture Looked as If It Was Floating Around the Room

The Details Were to Die For

Karl Lagerfeld Built a Garden Inside, Too

There Were Chanel Slot Machines

The Room Smelled of Chanel No. 5

Coco Chanel Holograms Stepped Out of Hat Boxes!

St. Vincent Performed

She joined her girlfriend, Cara [6], at the event.

Karl Got Cozy With His Chic #Squad