Last night, Mario entered the CBB house alongside 5ive star Abz Love, Geordie Shore's Charlotte Crosby and Saved By The Bell's Dustin Diamond to name a few.
Mario walked in to boos, but if former CBB winner Alex Reid is anything to go by, that doesn't mean he won't make it to the final.
His TOWIE future, however, is hanging in the balance and a decision as to whether he will return to the ITV2 show for the next series is now hanging in the balance.
A source tells Reveal: "Mario's casting on TOWIE is up in the air at the moment.
"Bosses will only decide whether he will return for the new series once he's out of Celebrity Big Brother."
In 2011, Kirk Norcross quit TOWIE before taking part in the nineth series of CBB. He has since returned, but does this mean Mario won't be back to stir up trouble in Essex right away?
A TOWIE spokesperson says: "No decisions have been made as yet on casting for series ten."
Celebrity Big Brother: This summer's housemates in pictures:
Copyright: Channel 5