The 45-year-old funnyman was a contestant on the 2017 series of the long-running ITV reality show – where he finished third.
Iain had a difficult time on the show – with many viewers feeling he was bullied by some of the other cast members.
Reflecting on his time, Iain says he has mixed feelings about the show returning to screens next weekend.
“Im also dreading I’m A Celeb starting up,” he began – making the statement on Twitter after revealing he is “dreading Christmas.”
“Really hard to explain but the essence is jealousy, a feeling of being left out and a sense that my time is over and I return to being a nobody again,” he continued.
“Having nightmares and knots in my stomach about it,” he added.
His moment of honesty provoked a flood of reassuring messages from fans – with many assuring him he is not a “nobody”.
However, his comments also drew the attention of less friendly quarters of the Twitterverse – with some lashing out at him for regarding the public as “nobodies”.
“That's literally not what I was saying,” the star responded as some began to round on him.