The reality TV star enjoyed a date with her French Bulldog over the weekend, following a relaxing break with new husband Professor Green in Italy and an undisclosed beach destination earlier this month.
Unfortunately, Herby didn't manage to bag a seat on the plane with the newlyweds, so it was no wonder that he looked so pleased to see Millie yesterday (29 September).
The twosome headed out for lunch in London and 23-year-old Millie couldn't resist cuddling up to Herby at every given opportunity. But he didn't seem to mind!
In fact, in one snap Herby looks delighted to be back in his owner's arms, since he appears to be smiling from ear to ear.
In the pictures taken on Sunday, Millie can be seen showing off her new fringe and wearing a leather jacket, as she snuggles up to her pet pooch.
She captioned one photo: "lunch time with @herbymackintosh".
That's right, Herby has Instagram!
On Herby's account, not only were there pictures with the former Made In Chelsea star, but he also posed for a couple of snaps with a cigarette in his mouth. The photo was captioned: "Don't call the RSPCA! Herby is just enjoying his Sunday."
Millie was recently forced to deny rumours that she is pregnant with Pro Green's baby, after photos emerged of her wearing a loose top on a night out.
She dismissed the speculation by saying: "Pregnancy rumours are just that… We are far too busy enjoying each other right now."
And enjoying Herby's company too of course!
What do you think of Millie's new hairstyle? Let us know below, as the best comment each week wins £50!