The youngest sister of the glossy Kardashian trio, 29, looked stunning as she entered the party via an escalator wearing a black lace jumpsuit from the collection paired with a see-through cropped jacket and towering black heels.
The brunette beauty completed her look with a sleek, straightened hair style and her the signature Kardashin smokey eye make-up.
She was joined at the party by celebrities including HELLO! Online bloggers Aj Odudo and Lucy Watson, as well as socialite Tamara Ecclestone.
Made In Chelsea's Lucy had her toned and tanned legs on display in a leather minidress that she paired with black stilettos and a gold necklace.
Tamara was showing off her baby bump in a demure black and gold shift dress.