Keeping Up With The Kardashians star Kim showed off her baby bump in a black, cape-style dress as she joined her sisters and mother at the swanky party on Monday (12 October).
Showing off her cleavage and blossoming bump in the skintight dress, 34-year-old Kim accessorised with a chunky necklace and scrappy black heels.
Mum-of-one Kim, who is expecting a baby boy with husband Kanye West, kept her hair slicked back for an overall sophisticated look.
Kim was joined on the red carpet by sisters Khloe, Kourtney and Kylie, and Kardashian matriarch Kris Jenner.
The Kardashian-Jenners were the stars of the night at the magazine's party on Monday, and it was a double celebration, as they're also the cover stars for Cosmo's November issue.
One person who didn't make the celebration was Kendall Jenner, but that didn't stop the famous clan from posing up a storm on the red carpet.
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