Britney’s ex is bucking to be a thin reality star. That’s right: Kevin Federline has signed up as an official cast member on the new season of Celebrity Fit Club.

He’s already on the set, though at this early stage there is no discernable difference in his overall body mass index.

K-Fed will reportedly join ex-girlfriend Shar Jackson, Baywatch beauty Nicole Eggert and singer Bobby Brown for the latest VH1 installment.