STRICTLY Come Dancing may be thrown into chaos after Will Mellor revealed he's suffering with a sudden illness.
The former Hollyoaks actor, 46, said he's not trained all week after catching a virus.
The TV star - who wowed the judges with his Dirty Dancing routine last weekend - admitted he was terrified ahead of Saturday's performance.
Will is set to dance an emotional Rumba with pro dancer Nancy Xu this weekend.
The former Corrie star joined It Takes Two host Janette Manrara on the spin-off show and opened up about his fears ahead of the fourth live show.
The presenter kicked off the segment and said: "Will, we just have to start by saying, that you've not been feeling very well this week, how are you feeling now?"
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Sounding very poorly with a hoarse voice, Will replied: "No no I don't sound great. I've been in bed, I got a bug, a virus.
"I've not trained all week.
"We're just hoping Dr Theatre kicks in and I can do what I can for Saturday."
Repeatedly coughing, Will said they will be dancing to Ed Sheeran's The Joker and The Queen.
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Nancy said: "I don't want to lie but there is a little bit of worry inside of me."
Will interjected and said: "You're worried - I'm terrified. I'm just praying that I wake up tomorrow and I feel better."
Still unsure if he will be able to pull off the dance routine on Saturday, Will added: "I really want to dance because it's a beautiful song and she's come up with this beautiful routine.
"I really want to do it justice but I can't help it if I'm unwell."
Fans raced to Twitter worried that Will's lack of training may land him in the bottom two and at risk of going home.
One wrote: "Is Nancy sitting miles away from Will so she won't get the lurgy? That's not going to work on Saturday. #ItTakesTwo."
Another posted: "Oh no! I hope Will doesn't have to pull out or he might be in the bottom two. #Strictly"
A third said: "Oh dear! Poorly Will. #ItTakesTwo"
Strictly contestants are usually given one free pass to next week for unforeseen circumstances.