Charlie will soon be heading to Sin City with his co-stars including sister Chloe Sims and cousin Joey Essex to film two special episodes for the new series of the ITV2 reality show.
Charlie endured a gruelling session with International Boxing Federation world middleweight champion Darren Barker, and we're sure he must have been put through his paces!
A topless Charlie, who was clutching Darren's red IBF belt, captioned the snap: "#SimsGym #TrainHard #TOWIV #VegasBody #EatGoodFeelGood #Boxing."
Charlie, who will be heading over to Vegas as a singleton after splitting from co-star and girlfriend of three years Ferne McCann, later added: "Can't wait for Vegas .. Not long now #VegasTraining! #TOWIV."
Ferne too has tweeted her excitement. She said last night: "I am absolutely buzzing for #TOWIV @OnlyWayIsEssex I want you all to know that I am POKER queen! #jammy #poker."
Meanwhile, Ferne's close friend Billie Faiers is making sure that she leads the fashion parade. She said yesterday: "Morning everyone!! Serious clear out of my dressing room this morning in prep for my Vegas packing .... #TOWIV ...xxx."
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