The former Made In Chelsea star, 25, was quite rightly very proud of herself after showcasing her clothing range at the Clothes Show Live exhibition at Birmingham's NEC.
Millie launched her own self-titled clothing line in September after eight months of design and development.
And the capsule collection - consisting of 40 unique pieces including dresses, tops, jumpsuits and jackets - was shown off to full effect on Saturday (6 December) as Millie's gorgeous models sashayed down the catwalk wearing her garments.
Clearly excited before the big event, Millie took to Twitter to keep her fans updated.
She told fans she was "practising her walk" and also thanked her models for their part in her special day.
The former make-up artist wrote: "Thank you beautiful ladies for doing such a great job modelling @kimski86 @millie_mackintosh_collection #CSL."
After braving the intimidating catwalk with her models, Millie later added: "Proud! millie_mackintosh_collection #CSL #dreamcometrue."
Wearing a sheer black top over a sexy strappy bra, teamed with a zipped black skirt flashing plenty of leg, Millie gave the likes of Victoria Beckham a run for their money in the style stakes.
And like Posh, who makes up one half of a celebrity power couple, Millie's success is matched equally by that of her rapper husband Professor Green.
As well as celebrating her own achievements, Millie didn't forget her hubby's current tour when she tweeted: "Can't wait for tonight @professorgreen @o2academybham."
Are you a fan of Millie Mackintosh's style? Tell us in the comment box below and you could win £50!
Reveal is now on Google Plus! Join us here for the latest pictures, fashion and celebrity news!