And just when you thought it couldn't get any cuter, the loved-up pair attended a pal's wedding together and posted countless smitten snaps of the big day.
But our personal favourite was a video the former Made in Chelsea star posted of his girlfriend diving to catch her pal's bouquet.
The gorgeous Mills was pictured jumping across a group of girlfriends to snatch the beautiful blooms herself. Is she hinting, Hugo?!
It seems he had the same idea though, as he captioned the vid, "next time my love @milliemackintoshofficial #fingertips" alongside some church and crying laughing-face emojis.
The Taylor London entrepreneur also shared an adorable pic of the couple kissing, while she shared a snap of them looking VERY glamorous together at the wedding.
The stunning Millie wore an ethereal yellow gown, which featured a gorgeous halter-neck and split thigh detail.
She accessorised the beautiful dress with a pair of barely-there heels and some simple hoop earrings.
The way things are going for these two, we wouldn't be surprised if we hear wedding bells by the end of the year!