But one thing we thought WAS certain was that "no Chelsea people" would be present at the big day, if Hackney-born groom Professor Green was to be believed during a Radio 1 back in June.
However, it seems a select few were slipped an invite to the Chelsea event of the year on the quiet.
Millie's Made In Chelsea co-stars Caggie Dunlop and Rosie Fortescue were all smiles at the countryside wedding yesterday. Well, they have been mates since their teenage years!
Meanwhile, Cheska Hull – one of the Chelsea that wasn't invited – wasn't going to go quietly as she wished Millie an amazing day on twitter from her living room. Or the bus. Or anywhere other than Millie's wedding.
Have an amazing day @millsmackintosh thinking of you xxx— Francesca Hull (@Cheska85) September 10, 2013
Well, as Miley Cyrus would say: it's her wedding, she can invite who she wants to.
Do you think it was fair for Professor Green to ban the Made In Chelsea lot?
MILLIE MACKINTOSH'S VINTAGE LACE ALICE TEMPERLEY GOWN
MILLIE MACKINTOSH WEDDING DAY CONFIRMED
MILLIE MACKINTOSH'S SUPERFOOD GREEN SMOOTHIE RECIPE