Four slimmers who have a combined weight of half a tonne have taken on the ultimate challenge to lose more than 20stone between them.
This is a weight-loss competition with a difference though, because they're going head-to-head as well to see who can lose the most weight in the first month.
It has been set up by Chris Jewkes, a personal trainer from Wolverhampton, who'll be guiding them. Let's meet the contestants:
ITV News Central will be following the progress of these slimmers over the next twelve months. The first weigh in is in February when the 'biggest loser' will be crowned.