She is a fashionista of the highest rank.

And Rosie Fortescue once again proved her sartorial prowess as she attended the launch of Ciao, her sister’s new dating app, at London’s Sketch restaurant on Thursday night.

The 26-year-old Made In Chelsea starlet looked simply stunning in a flesh-flashing gown which she topped off with a silver bomber jacket.

Rosie showed off both her natural flare for fashion along with her stunning figure as she wore the slashed gown which showed off her hips and cleavage.

The dress had a knotted top which extended into a halterneck while falling into another twist which just about covered her assets.

Falling down to mid-calf, the hemline drew attention to her trendy red heels which coordinated with the lip detailing on her black clutch bag.