Strictly Come Dancing could be thrown into chaos tonight, show bosses fear.
It's after a number of pro dancers came down with a mystery bug leaving them feeling poorly.
Currently 11 celebrities remain in the running for the glitterball trophy and one more will be given the axe this Sunday night.
It's already been confirmed that Brendan Cole will NOT be performing due to illness. Instead, Anastacia will dance with Gorka Marquez, previously partnered up with the now eliminated Tameka Empson.
But Brendan is one of at least six dancers who are feeling under the weather, according to The Sun newspaper.
A 'mystery virus' is hitting the stars of the show with many experiencing flu like symptoms.
As well as Katya and Brendan, Aljaz Skorjanec and Anton du Beke are all reportedly sick ahead of Saturday's show.
And worse still, the illness has also impacted extra pro dancers who my need to be called upon just like Gorka.
Neil Jones as well as Janette Manrara, who was eliminated with celebrity partner Melvin Odoom week one, are said to be sick too.
According to The Sun, show bosses are understandably nervous ahead of Saturday's live show with one pro already out.
There are also fears the illness could impact the celebs, who seem to have escaped so far.
"Producers are now concerned some of the other pros could be following in Brendan's footsteps," a source told the paper. "They have to rehearse and dance very intimately. And at the moment they are dropping like flies.”
Strictly Come Dancing airs live tonight at 6:35PM on BBC One.