He was once a trim backing dancer, but over the years Kevin Federline has taken a break and piled on the pounds.

Which is why Britney Spears’ ex-husband signed up to appear on the U.S. version of TV show Celebrity Fit Club.

The 31-year-old stars alongside seven other famous American stars in the latest series of the reality show, which sees its overweight celebrity contestants trying to lose weight with the help of a dietician, a life coach and, of course, strict drill sergeant Harvey Walden.

Scroll down to see the trailer for Celebrity Fit Club…

Battle: Britney Spears’ ex-husband Kevin Federline shows how much weight he has put on as he attends the weigh-in for Celebrity Fit Club

Federline weighs in at a staggering 240 pounds (17 stone) at the beginning of the show, joking that he looks like a pregnant man.

He blames his weight gain in recent years on depression following his divorce from Britney Spears, with whom he has two sons four-year-old Sean Preston and three-year-old Jayden James.

He revealed: ‘Me and Brit are good now. Everybody knows I’ve had a tough road but I am happy where we are at now. Everything we went through played a part in my weight gain.

Training: The former dancer blames his divorce from Britney Spears, and subsequent depression, for his weight gain

Weight loss: K-Fed appeared slimmer on a recent shopping trip in the San Fernando Valley with his current girlfriend Victoria Prince

‘You go through certain situations in your life and some people get depressed and eat more and I was one of those people. Some people get stressed and they lose weight. With me that wasn’t the case.

‘I went through a lot of things and I would definitely say that those things contributed to me gaining weight – that is for sure.’

K-Fed appears alongside his ex-girlfriend Shar Jackson, former R&B bad boy Bobby Brown and Baywatch actress Nicole Eggert amongst other U.S. celebrities on the seventh season of the show.

Biggest losers: Baywatch actress Nicole Eggert and R&B singer Bobby Brown will be hoping to shed their extra weight as they compete on the show

Brown, former husband of Whitney Houston, is a far cry from his youthful days as an R&B pinup.

Talking about his huge belly, the 41-year-old admits: ‘ I used to take my shirt off a lot. Now my six-pack is gone and this is a keg.’

Meanwhile, despite his divorce from Britney, Federline has revealed he would not rule out getting married again in the future.

Weight gain: K-Fed looking heavy in July last year (left) and his previous slimmer size at Teen Choice Awards in August 2006

He told People magazine: ‘Anything is possible. Would I get married again? Definitely.’

After being asked if he was more wary of relationships since his divorce, he took time to praise his current girlfriend volleyball star Victoria Prince.

He said: ‘No, I’m not. I just want to be happy. Right now, I really am happy. Victoria’s a great person. She’s an incredible person.’

via dailymail