Colm Murray, one of Ireland's best-known sports broadcasters, has died at the age of 61.
The RTE presenter died on Monday night after a three-year battle against motor neurone disease.
He was diagnosed with the fatal neurological disorder in April 2010.
Last year the journalist - best known for his horse racing coverage - was recognised with a People of the Year Award for his work in highlighting the debilitating disease.
The father-of-two, from Moate in Co Westmeath, poignantly died during the week of Galway Races.
Taoiseach Enda Kenny said Murray was the voice of Irish racing for many years and he lit up the coverage of racing meets with his passion and enthusiasm.
"I had the pleasure of being in Colm's company recently and could see he was a proud Westmeath man who brought out the best in those around him with his affability and gift for storytelling," he said.
"I would like to extend my deepest sympathies to his wife, Ann, and daughters, Patricia and Kate, and sister, Mary. He is also a huge loss to all in RTE and my thoughts are with all who had the pleasure of knowing Colm during his lifetime."
Noel Curran, director-general of RTE, said colleagues were deeply saddened by Murray's death and that he would be rightly remembered by the horse racing community for his enthusiasm and authority.
"The courage that Colm has shown over these past couple of years has been truly extraordinary," he said. "The news is all the more poignant given the recent sudden passing of his sister Cathy, who also worked in our newsroom. For all who worked with him in RTE, he will be remembered as a wonderful colleague and friend."