We actually can't take our eyes off the 27-year-old British supermodel - seriously, her abs are popping out of that leather laser-cut halter bralet.
Glossy, gorgeousness is all part of RHW's day job and the lady makes working the runway scene look effortless. The high-waisted check trousers, the patent belt, the tunic crop, the cuffs and that slicked back 'do? Pure siren.
And it's all down to her super-healthy diet and dance classes. In a recent interview with Grazia she said, "I love dance classes! I love Body by Simone - I go with my girlfriends, we all go and sweat our faces off and then have a healthy breakfast.
"You have to make it fun! I like to go to dance classes and feel like Beyoncé". We hear you, sister.
While all eyes were on Rosie's killer looks and damn perfect pins on the catwalk Thursday afternoon, Karlie Kloss, Joan Smalls, Jourdan Dunn and fashion month's front-runner Kendall Jenner (FYI she's Kim Kardashian's step sister) also showcased the latest designer wares from Olivier Rousteing.
Which, naturally, meant Kim and Kanye West were on the FRow scene.
As for the collection itself? Think lots of sharp, sexy tailored suit jackets paired with high-waisted wide-legged trousers, cut-out dresses, jumpsuits, bandeaus and crops.
Stripes and checks were worked across key pieces, and sheer (S/S 2015's fabric du jour), leather and silk gave the nod to sexy in a big way.
See the full catwalk collection here.