The Made In Chelsea star makes no secret of her love for style - she has her own blog and is also launching a clothing collection for Lipstick Boutique - so it's hardly surprising she's stepped out for the most important event in the fashion calendar!
Showcasing her chic style credentials, Rosie wore a black, white and blue tartan miniskirt as she made her way to the Bora Aksu spring/summer '15 show.
The starlet added a cropped black jumper while throwing a checked grey coat across her shoulders for added warmth, accessorising with a gold Chanel necklace from Susan Caplan Vintage.
Of course Rosie wore heels for the occasion, slipping on black peep-toe wedges which revealed her autumnal berry purple pedicure (get the look with Rosie's fave Essie nail polish shade, Bahama Mama, £7.99).
She wore her hair slicked back away from her face - the same style she rocked at her pal Millie Mackintosh's clothing launch - while adding a couple of colourful ear cuffs, oodles of mascara and a touch of just-bitten pink lipstick.
But the star of her look? Well, it had to be her fancy-pants designer handbag, of course!
The reality star stashed all her fashion week essentials in a swoon-worthy Céline Trapeze bag, opting for a tri-colour version with shades of baby blue and black leather teamed with brown suede. We want!
What do you think of Rosie's outfit? Let us know by commenting below as the best comment across the site each week wins £50!
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