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The 68-year-old former politician has previously taken part in Strictly Come Dancing, Hell's Kitchen and Celebrity Wife Swap.
Liverpool-born Edwina previously aired her opinion on I'm A Celebrity... when Conservative MP Nadine Dorries took part in the all-star reality show in 2012.
"If you're going to do a programme like this ... you have to enter into it in a spirit of fun," she said. "If you go in there with your ego waving it's going to be the first thing that the editors will cut down."
I'm A Celebrity ... Get Me Out Of Here! begins on ITV on Sunday 16 November.