The former Made In Chelsea star kick-started her week with the healthiest breakfast we've ever seen, before rounding off her Monday with a hot yoga session!
We're exhausted thinking about it, but over to you Millie...
"Hot yoga was intense tonight.. 47 people! #sweatybetty #yogi," she Tweeted.
Millie also shared a snap of her breakfast on Monday morning, opting for spinach, avocado and coconut water.
She added: "Homemade chia seed porridge and green juice.. Worth waking up for!"
Millie's healthy day came just after she posed in a daring Julien Macdonald number for London Fashion Week.
Almost completely sheer at the sides, Millie's super slim figure was clear to see.
Millie is also just back from a romantic trip to Paris with her husband Professor Green, where the pair indulged in all that the romantic city had to offer.
Complaining of a hangover at one point, it's maybe no wonder that Millie has been keen to have a healthy start to her week.
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