Ex-Coronation Street actress Michelle is currently in fourth place on Amazon's best-selling celebrity calendars of the year list so far.
And Mark couldn't be prouder!
Reacting to a news story about his other half's success, he simply tweeted: "That's my girl!"
Fans were quick to respond to his message with plenty of their own, many describing the former TOWIE heartthrob has the "luckiest man" in the UK to be engaged to gorgeous Michelle!
One wrote: "Not surprising Mark. She's the most beautiful girl. Stunning. She's perfect."
Another said: "Luckiest geezer in the world. I salute you!"
Michelle's calendar, according to Amazon, has only been beaten in sales this year by One Direction, Olly Murs and 5 Seconds of Summer, meaning she's the top selling celebrity female calendar of the year.
Next in the list is Kelly Brook at number six, Cheryl Fernandez-Versini at number seven, and Kylie Minogue at ten.
This was Michelle's first official calendar - not a bad result, right?!
Earlier this year, Reveal shared the gorgeous cover of Michelle's sizzling calendar – and got all the behind the scenes info on how to recreate her beautiful make-up look.
Fancy stealing Michelle Keegan's look? Check out our tips and hints in this interview with her.
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