Big Brother's Spencer says modelling agency Select has told him he is too heavy to be a model.
The former housemate has been instructed to stop drinking beer and aim to make his face thinner.
But he says he doesn't want to lose weight.
He told Heat magazine: "I said 'You know what I looked like before you signed me up, I was on TV constantly for four weeks.'
"I'm not going on a diet because I don't want to lose weight. I'm never going to look like Alex or the skinny blokes in pictures on the walls of the office and if that means I can't be a model then so be it."