Sir Bruce Forsyth is "touch and go" to co-host 'Strictly Come Dancing' tonight after being struck down by illness.
The 84-year-old presenter - who fronts the BBC One programme with Tess Daly - had to pull out of rehearsals yesterday due to "flu-type symptoms", so bosses have put Sunday night co-host Claudia Winkleman on standby for tonight's semi-final as there are "real concerns" he won't recover in time.
A 'Strictly' insider told the Daily Mirror newspaper: "Bruce had to go home, he has flu-type symptoms and wasn't in a good way. Claudia has been rehearsing his lines in case he can't make it out of his bed. It is really touch and go.
"The most important thing is that he gets himself well, especially as the final is next week. We would hate him to miss that.
"Knowing Bruce he'll have no intention of missing such a key show as the semi-final. He will do everything he can to be there like the true professional he is."
Bruce is expected to seek medical attention today if he feels any worse, but friends of the veteran entertainer - who has co-presented 'Strictly' since 2006 - hope he will make a "miraculous recovery".
A close friend of the star said: "He loves the show and would have to be unable to get out of bed to miss it.
"I wouldn't bet against him making a miraculous recovery."
Meanwhile, Lisa Riley has been struggling with her American Smooth routine this week and at one point during training she grabbed her coat and stormed out in tears while moaning about professional partner Robin Windsor.
She said: "He has no idea what I am saying to him".
The former 'Emmerdale' star is the favourite to be booted off the show at the semi-final stage, with 888sport.com offering odds of 8/11 for her to be the next star eliminated, with Dani Harmer at 3/1.
Louis Smith is still hot favourite to win the show at 8/11, followed by Denise Van Outen (7/2) and Kimberley Walsh (13/2).
The 'Strictly Come Dancing' semi-final is on BBC One tonight at 6:30pm.