The Keeping up with The Kardashians star made an appearance at the WWD And Variety Inaugural Stylemakers' Event in Calver City with her hairstylist Jen Atkin and make-up artist Joyce Bonelli as her plus ones and blew everyone away in the figure hugging number as she posed for the cameras.
It looks like Kourt took a few style lessons from pregnant sister Kim Kardashian as she paraded her stunning hourglass figure in the dress that featured a classic, high-neck detail, a thigh-split and a darted waist that nipped her right in.
But it wasn't just the dress that caught our attention as mum-of-three Kourtney made us all hugely jealous of her svelte locks which boasted an almost otherworldly shine!
Luckily for us, Kourtney's hairstyling maestro Jen took to Instagram during the evening to let us in on her glossy secret and mentioned that a pea-sized amount of the Kardashian Beauty Black Seed Dry Oil is what she used for a sleek, healthy finish.
We've already stockpiled it!
Kourtney wasn't the only KUWTK beauty out on the town last night as mum Kris Jenner joined model of the moment Gigi Hadid at a mutual friend's jewellery launch party while Kylie and Kendall landed at L.A.X airport after a stint in Australia.
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!