Russell Grant has vowed to battle through the pain and hit the Strictly dancefloor this weekend.
The roly poly astrologer is having physiotherapy after hurting his knee in the last show.
Writing on his blog, he said: "The knee has continued to play me up so the doctors thought it would be a good idea to have an MRI scan to see what's going on.
"It is rather painful and I will have to watch what I get up to, but luckily this week's dance is the Samba and that means a little less wear and tear on the knee."
Russell, who shot to fame on breakfast television in the 1980s, also claims to have encountered "one or two inexplicable happenings" during rehearsals for the BBC's hit ballroom show.
He said: "First of all I heard someone call 'Russell', but there was no one to be seen. Then Flavia heard someone cry out, but again there was no one to be seen. To top it all I saw a figure run along the back of the balcony and apparently this is not the first time that people have seen this strange apparition in the hall. It's all very spooky."