The Made In Chelsea star was spotted leaving a restaurant in Soho, flashing her pins in her figure-hugging number.
Luckily she made sure to wrap up with a pair of opaque tights, adding a smart edge to her ensemble with a classic black blazer.
The pretty brunette also sported a baby pink sheer blouse which she buttoned all the way to the top.
In keeping with the usual Chelsea girl style, Lucy wore a designer handbag (Prada, to be exact) in the crook of her arm while showcasing perfectly-manicured nails.
But while her choice of arm candy may be pretty pricey, Lucy opted for a purse-friendly pair of 'Boy Front Zip' boots, £85 from Office.
With their exposed zips and silver toe detailing, these babies have shot straight to the top of our lust list (along with her handbag, of course!).
While we don't know who Lucy's lucky lunch companion was (not Spencer, we hope...), we do know she suffered a slight beauty malfunction during her outing.
Earlier in the day, the reality star tweeted: "Fresh lipgloss & windy weather = baaaaad combo."
We hear you, Luce!
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