The TOWIE star has bravely left his sisters Giorgina and Giovanna in charge of tweeting on his behalf and drumming up support while he is on the popular Channel 5 show.
And although they have put a lot of effort in to getting Mario's followers to save his place in the house with their votes, the girls couldn't resist stitching their brother up a little bit at the same time.
Mario is up for eviction tonight (11 September), so his siblings are pulling out all the stops to secure votes by tweeting snaps of Mario as a youngster.
Giorgina kicked things off by uploading a childhood picture of her brother on her own Twitter profile on Monday (9 September). It shows the Essex heartthrob with much lighter coloured hair than he has now and standing at the seaside.
She wrote: "Cute little Mario!! Awww"
But when Giovanna - who is married to McFly's Tom Fletcher - caught wind of what her sister was doing, she decided to do the same - only this time on Mario's Twitter account, which has over 825,000 followers!
Giovanna wrote: "Great idea, let's embarrass him a little before he comes out. Haha! Xx"
She then posted a snap of baby Mario sitting at a dining table and smiling at the camera in a red T-shirt.
The picture was accompanied by a phone number for fans to call if they wanted to save the TOWIE star from being evicted.
Giovanna didn't stop there though, and tweeted another throwback photo of her little brother sitting between herself and Giorgina in his school uniform.
She jokingly captioned the the snap: "…and that is why you should never leave your big sisters in charge of your twitter account!Take note! #CBB #TeamMario"
Mario is facing eviction from the Celebrity Big Brother house along with Courtney Stodden, Louie Spence, Carol McGiffin and Vicky Entwistle. If he is not sent home tonight, he will make it to Friday's final.
We guess we will have to wait and see whether those baby pictures have saved him!
Are you hoping that Mario makes it to the final? Let us know below!