The good news is, it’s Dr Gillian McKeith, which promises to make for some ridiculous viewing all the same.
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According to the Daily Star, Gillian - best known for her expert knowledge of nutrition (and, lest we forget, poo) on ‘You Are What You Eat’ - will make a temporary appearance in the ‘CBB’ residence during Tuesday (26 January) night’s live eviction, as part of a special boot camp task.
The task will see all cigarettes, alcohol and sugary substances removed from the house, with Gillian keeping a watchful eye over the housemates to make sure none of them cheat.
This isn’t Gillian’s first brush with reality TV, though, having made an infamous appearance on ‘I’m A Celebrity’ back in 2010.
She made headlines with her extreme reactions to Bushtucker Trials, which made her one of the most memorable campmates ever.
Emma Willis previously teased that the house was getting a special guest during Friday night’s live show, sparking speculation that Stephanie’s model boyfriend, Sam, would be going in to confront her.
However, he later insisted on Twitter that he would not be heading into the house.
Catch Gillian’s arrival - and either Christopher Maloney, Danniella Westbrook, Jeremy McConnell Cooke, Scotty T or Tiffany Pollard’s departure - in Tuesday night’s ‘CBB’, airing at 9pm on Channel 5.