Johnny Ball's Strictly Come Dancing partner Aliona Vilani has fractured her leg during rehearsals.
It was reported that Johnny pulled Aliona in the wrong direction when attempting a tricky move in rehearsal, resulting in Aliona twisting her ankle and feeling a "pop" in her leg.
The dancer was quickly rushed to hospital, to discover that she had suffered a hairline fracture.
A spokesperson said: "Initial prognosis suggests our plucky pro-dancer may be out of action for the next two to four weeks, but a further appointment tomorrow will confirm her condition."
Johnny is said to feel "terribly guilty" about the incident. Details about who his partner will be in the time being have not yet been released.
The 74-year-old presenter is the oldest Strictly contestant to date. His daughter, DJ Zoe Ball, hosts the weekday sister-show of the competition, It Takes Two.
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