This is the bag. Mother of all ‘it’ bags, really,' author Marisa Meltzer says in a video shared by Sotheby's to promote the auction.

The original Birkin bag, named after the actor, singer and fashion icon that Hermès created it for — the late Jane Birkin — is up for auction in Paris.

Kylie Jenner is no stranger to one-of-a-kind pieces of fashion. She's been known to wear custom dresses at runway shows in Paris, lean into a throwback accessory, or coordinate with her boyfriend Timothée Chalamet at the Golden Globes. So it was no surprise to see that she casually owns two rare Hermès purses.