The hunky Italian tailor uploaded the selfie earlier today (20 February) and wrote: "Slowly but surely getting back into some sort of shape!"
We weren't aware that he was ever out of shape!
In the snap we can see Mario pulling a funny face for the camera, while posing in front of a large mirror with his tattoo sleeves on full display.
Oh and not forgetting that impressive six-pack too!
He and his Essex co-stars, including James 'Arg' Argent, Billie Faiers and Ferne McCann, are currently busy filming for the upcoming series of TOWIE, which begins on Sunday (23 February).
And with hot new girl Grace Andrews joining the cast, it's no wonder Mario is keen to work on his physique.
This week, TOWIE star Elliott Wright told Reveal that Mario is has been trying to woo Grace, so perhaps a sexy six-pack is his way of bagging a date?
Elliott said: "I've seen Mario trying his luck quite hard. I've seen him really trying to crack on with her. I don't know if she binned him and he didn't like it."
Well, maybe this new photo will sway her!
Last weekend, Mario celebrated his birthday with his Essex pals at a local nightclub.
But although we are gutted we didn't get an invite, fans will be able to see all of his birthday party antics on an episode of TOWIE very soon.
Check out the new series 11 trailer for TOWIE below:
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