The supermodels celebrated fashion photographer Mario Testino's 60th birthday at London hotspot The Chiltern Firehouse on Wednesday night - and let's just say they made an effort on the outfit front.
Both ladies embraced vintage glamour in their low-cut, floor-sweeping gowns. Yes, they're in their 40s, but Kate and Naomi reminded us exactly why they're two of the world's most famous models.
Kate wore a sheer red dress over her Stella McCartney leopard print bodysuit. She completed her look with 1940s-inspired side-swept curls and a matching scarlet lipstick. Vamp, or what?
Naomi complemented her best pal's look in an equally dazzling ensemble - a slinky silver gown paired with a diamond snake-shaped necklace and a chic updo adorned with red roses.
With these two to get the party started, we imagine Mario - who was suited and booted in a white tuxedo jacket and bow tie - had a blast.
They weren't the only celebrity guests, either. The famous fashion duo were joined by Lara Stone and David Walliams, Sienna Miller - who wowed in a little red dress - Rita Ora, Tinie Tempah, Poppy Delevingne, Stella McCartney and Keira Knightley.
It must have been quite the party. Happy birthday, Mario!
In other Kate Moss news, there aren't many people who can say they've had a champagne coupe modelled on their own breast...
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