The former Made In Chelsea star tied the knot with her musician beau at the beautiful Babington House in Somerset on Tuesday afternoon (10 September).
Millie confirmed the nuptials via Twitter that day by posting two gorgeous pictures from the ceremony alongside the simple captions "self explanatory" and "happy".
She later added: "Thank you to all for the lovely messages! Best day of my life x."
Millie and Pro Green – real name Stephen Manderson - married in front of guests including Millie's ex-Made In Chelsea co-stars Rosie Fortescue and Caggie Dunlop and Professor Green's friend Lily Cooper.
23-year-old Millie looked stunning in a white vintage lace wedding gown as she walked down the aisle with her father.
There's no word yet on where Millie and Pro Green will be heading on their honeymoon, but as Pro Green's sworn off Twitter for a while, we wonder if they're jetting off somewhere soon…
He tweeted on 9 September: "Thank you all for your kind wishes, as you may have read I'm marrying the love of my life tomorrow so I'm off for a little while, big love."
Congrats to Millie and Professor Green!