It's after 'The Beast' was linked to this year's show, only for it to turn out that we were confused with Game of Thrones actor James Cosmo in a teaser released by Channel 5 last month.
"My friends thought it was me, my brothers thought it was me, even I thought it was me," Mark admitted to the Metro newspaper. "I have had at least two friends wanting to put a bet on me. I cannot believe I was briefly 7-1 joint favourite!
"The Chase producers phoned my agent at the weekend and asked him if we had something to tell them, especially as I am filming The Chase at Elstree this month!"
And he revealed: "I know he is a good friend of one of the producers on The Chase so I suspect his teaser video might not have been a coincidence..."
But while his rumoured participation in the latest series was just a mix up, Mark says he could be 'persuaded' to take part in the show for real.
"As a working minor celeb I will consider any show if the fee is right," he confessed candidly. "Five years ago, I was earning £100 a day as a supply teacher so I always keep my eye on the important things in life.
"If I went on CBB, the isolation would be my biggest problem - with my job I am a news and information junkie and I am always reading or web surfing info, so I would probably suffer withdrawal symptoms from the digital world."
Celebrity Big Brother will be back on in the summer on Channel 5.
Could Mark be one of the housemates? Perhaps if the price is right...