The Made In Chelsea star opted for a smart casual outfit as she attended The Company of Dogs Portrait Exhibition launch party in London last night (20 March).
Rosie kept things simple with a pair of super-skinny leather trousers teamed with a black and white striped top.
To help ward off the chills, the fashion blogger added a tailored black jacket which she wore in a shoulder-robe style.
And she showed off some impressive designer booty too, toting an a-mazing taupe Céline Trapeze handbag (which we want) along with a beautiful pair of Valentino heels (which we really want!)
Her fancy footwear featured bright blue pointed toes and nude straps covered in gold studs. Swoon...
Rosie also took the opportunity to show off her new hair, having had a cut and colour at Paul Edmonds' salon in Knightsbridge earlier that day.
We're used to seeing the starlet rocking deep brown tresses, but it looks like she's lightened up for spring with caramel and blonde highlights.
The exhibition showcased photographs of dogs taken by photographer Gerrard Gethings, including pooches with celebrity owners and also dogs who are looking for a new home with Dogs Trust.
Elle Macpherson, Mark Ronson and Peaches Geldof's pets are featured in the exhibition, and Rosie's adorable dachshund Noodle is there too!
Posting a snap during the night, Rosie tweeted: "My beautiful mummy in front of Noodle's portrait by @GezGethings at the @PetsPyjamas event for @DogsTrust."
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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