Mr Motivator has been forced to pull out of BBC One's new gymnastics show Tumble before it's even begun.
The fitness guru, real name Derrick Evans, was one of ten celebrities in training for the Strictly Come Dancing style series which launches next month.
But the 61-year-old has been forced to withdraw from the competiton after dislocating his knee during training.
According to The Sun, a bad landing while practicing a straddle vault left him in need of surgery to his leg.
He said: “I’m devastated.”
The newspaper reports that show bosses are now looking at whether or not to replace him, even though the show starts in just two weeks' time.
Other celebrities on the Tumble line up include world boxing champion Carl Froch, Girls Aloud star Sarah Harding, EastEnders actor John Partridge and Loose Women host Andrea McLean.
They'll all be competing to win the public votes by performing stunts live on Saturday nights in the six week long contest from August 9.