The reality starlet channelled her inner Audrey Hepburn in this stunning black and white dress which boasted a unique lattice overlay and a Kim Kardashian-esque choker to boot.
Even though Rosie flaunted her (flawless) legs for the photographers, she oozed sophistication in the little monochrome number that drew attention to her perfectly slender frame.
Do you need a gym partner, Rosie?
The stunner - who was joined by pals Millie Mackintosh and Roxie Nafousi - teamed her frock with a pair of perspex pointed court heels, a mock croc envelope clutch bag and she kept her jewellery to a minimum with a chunky gold watch.
Rosie styled her mousey brown locks into perfect tousles for the swanky event which took place at the infamous 155 Bar and Kitchen and went all Kylie Jenner on us with a gorgeous matte mauve lip.
So much fashion inspo, it's unreal.
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