The fashionable pair flew to Los Angeles to attend the star-studded bash and absolutely rocked their outfits.
Kendall oozed 60s cool and opted for a monotone ensemble, including this sand coloured mini skirt complete with a chunky belt, which showed off her enviable pins, and a glittering roll neck top that accentuated her super toned physique.
Cara ditched the jeans and beanie and confirmed that the jumpsuit is the look of the summer in this black number with a mesh bodice and cute spaghetti straps.
She teamed the classic all-in-one piece with a pair of strappy sandals to match Kendall's.
Staying true to the laid back style that is typical of Calvin Klein, both girls opted for relaxed waves and barely there make-up which let their outfits do the talking.
Sisters Kylie Jenner and Khloe Kardashian joined the bash later on, and posed for a family pic with stunning Kendall.
We also LOVE Kylie's monochrome printed jacket and crop top combo. It's almost too much gorgeousness to handle!
Reality star and model of the moment Kendall recently became the poster girl for Calvin Klein jeans, which saw her pose in a series of edgy snaps alongside hunk of a male model, Simon Nessman.
Can we just be her already?!
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