Fans, however, managed to take screengrabs of the elegant looking invitation, which is now all over social media.
The invite is really rather beautiful, featuring the embossed initials M & M in reference to Mark and Michelle, and appears to have been delivered in a delicate looking floral-patterned envelope secured with cream ribbon.
Michelle and Mark have been surprisingly tight-lipped about their wedding ceremony, apart from confirming it will happen in the UK this year.
It's rumoured the nuptials will take place later this month at Hengrave Hall in Surrey.
Michelle and Mark have both celebrated their hen and stag dos now, so the date certainly appears to be drawing close! Michelle partied in Dubai with her girlfriends, while Mark jetted off to Las Vegas with pals.
Take a look at Mark and Michelle's romance:
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