The former Made In Chelsea star is known for her flawless sense of style and she certainly amped the ante while celebrating the opening of American Eagle Outfitters' first UK store.
Millie - who was joined by husband Professor Green at the event - flaunted her sunkissed midriff by sporting a see-through lace top which revealed a glimpse of her black bra underneath.
The stylista upped the va-va-voom even more by slipping her pins into skin-tight leather trousers while adding a pair of rock chick lace-up heeled boots.
Her talons were decorated with a polished French manicure and her wedding ring glimmered on her finger, and the fashion designer styled her caramel brown locks in loose, tousled waves.
Make-up artist Millie always goes all-out with her beauty look and this time was no different, with the starlet opting for a bold pout with a slick of juicy tangerine lippy, teamed with a wash of shimmery champagne eyeshadow and natural yet defined lashes.
Meanwhile, Pro Green showed off his smart wardrobe too, sporting a denim shirt layered under a blue waffle knit jumper, adding black trousers and a pair of polished brogues.
Other attendees at the party included The Saturdays' singer Vanessa White - who glammed up her ripped jeans with towering court heels - and the clothing brand's ambassador Daisy Lowe.
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