The former Made in Chelsea star made her debut at the Cheltenham Literature Festival and absolutely aced folk chic in this dress - which you can nab from her own collection, FYI - and these cutesy suede ankle boots.
Proving that she has the best legs in the business, Mills turned heads at the gathering and slipped into this floaty frock which boasted crystal encrusted cuffs, a sparkly waist belt and a plunging neckline.
The bronde beauty ditched her trademark strappy sandals and went all Western on us in these super-sassy fringed boots which featured a fierce stiletto heel but she managed to avoid sinking into the mud as she posed up a storm for the paps!
Millie was all smiles as she rubbed shoulders with the likes of Ben Fogle and the lovely Carrie Hope Fletcher, sister to McBusted's Tom, before heading back to London to turn on the lights at hubby Professor Green's Wembley gig.
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