The reality star flew over to France in a private jet - fresh from her Webby Awards win - for luxury jeweller De Grisogono's party.
Suitably dressed for the occasion, Kim looked like she'd just robbed the brand's vault, taking to the red carpet swathed in what appeared to be a billion diamonds (but was actually a custom made Lanyu Couture gown).
Naturally, she teamed the look with some major De Grisogono diamond earrings.
Kendall Jenner has also been serving up some blinged-out realness at Cannes, heading to the Chopard (another luxe jeweller) party in this embellished, feathered Elie Saab haute couture creation.
Want to see more? Check out all the dazzling barely-there dresses from this year's Cannes in our gallery below: