Just a peek! Kylie Jenner hit the blue carpet at a party celebrating her new role as Nip + Fab's brand ambassador at the W Hollywood in Hollywood on Tuesday, December 15.

The Keeping Up With the Kardashians beauty, 18, showed off her slim figure in a black and white long-sleeved dress, complete with an accent cutout mid-torso. She accessorized the style with sexy, lace-up boots.

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Finishing the ensemble, Jenner, who's been linked to rapper Tyga for a year and a half, worked long, raven tresses, bronzed cheeks and a caramel-hued lip.

Kylie Jenner Announced As Brand Ambassador For Nip + Fab. Jon Kopaloff/FilmMagic

Jenner's appearance comes on the heels of the release of her sister-themedVogue spread, which appears in the fashion bible's January issue. Her costars include Bella Hadid and Lottie Moss.