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Sun Racing showcased her rapid rise through the ranks, which has seen her already amass prize money in the millions.
But the entire racing world is praying for good news after she suffered a devastating injury while riding at Grafton racecourse on Sunday.
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Kilner was riding Stella’s Turn when a mid-race incident saw her fall from the horse.
The rest of the meeting was abandoned and Kilner was airlifted to Gold Coast Hospital.
She was reported to be in and out of consciousness at the time but her trainer-boss Rob Heathcote has since updated followers on her progress.
He tweeted: “She is a very sick young girl and she is in a coma since the fall.
“She is currently, as at 6pm Sunday (Australia time) having surgery to release the pressure on her brain.
“It is a very grave situation and we should all pray for her to come through this.
“Leah is the most beautiful young lady I have met in racing so we need to pray for her recovery.
“I just wanted you all to know what’s happening as you love her as much as we do.”
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Clarence River Jockey Club chief executive Michael Beattie said: “Leah was unconscious but she was breathing unassisted the whole time and her blood pressure was good.
“But until she gets examined we won’t know what injuries she has suffered in the fall.
“Because there was such a long delay of more than an hour before Leah was airlifted from the course, there was a great wave of concern for her from the other jockeys.
“It was clear they were in a mindset not to ride so I had a discussion with stewards and felt in it was everyone’s best interests to postpone the rest of the meeting.”
More to follow.