Conor McGregor has donated €10,000 to the family of sick child in order to help him get treatment.

The UFC star made the donation anonymously but his identity has been revealed by the boy's mum.

Grainne McCullough posted a screenshot of an email revealed McGregor had paid the entire amount she wanted to raise.

Her son Bryan, nicknamed Bru, went into septic shock last September and was left on life support and required dialysis and blood transfusions.

The five-year-old spent 11 weeks in hospital before returning home to Drogheda in Ireland but he cannot walk and is fed through a nasal tube.

His mum then attempted to raise €10,000 in order to have a tube fitted into his stomach privately.

On the GoFundMe page she set up , Grainne wrote: "This is my last idea for my son as I've spent the last year trying to get him proper medical care from the HSE (Health Service Executive). He has a NG (nasogastric) tube in his nose since last September and I keep being fobbed off with excuses for delay in putting in a peg (Percutaneous endoscopic gastrostomy) tube.

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"He has seen no dietitian, we are desperate at this stage, we are looking for money for my son Bryan to get private care and the help he deserves. He had sepsis last year and is now unable to walk or eat I feel so bad for him xxxxx."

(Image: Twitter/ConorMcGregor)

McGregor made his donation earlier this week with Grainne struggling to reach her target.

Grainne told Dublin Live: "Conor has made our dreams come true in so many ways, and I can verify it wasn't for a publicity stunt, he privately donated to us, I just had to let him know how much we appreciate it.

"He said: 'Best wishes and hopes for a speedy recovery for Bru. From Conor, Dee and family'."

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McGregor is currently in Las Vegas preparing for his return to the Octagon.

He takes on lightweight champion Khabib Nurmagomedov on October 6 in his first fight in the UFC since November 2016.