The winner of the €29m EuroMillions jackpot has made contact with the National Lottery office in Dublin.
The country's newest multi- millionaire came forward to confirm possession of the winning ticket.
However, speculation over the identity of the winner is set to continue as the National Lottery will not be revealing the winner's name, the location of the ticket sale or any other details at this stage.
"We want to give the winner time and space to make arrangements and to let the news sink in," said a National Lottery spokesman.
"The name of the winning shop will be made known in the next day or so."
The winner will be able to collect the massive sum from tomorrow evening.
They have 90 days to collect their winnings, and the spokesman explained that the money first has to be collected from the other countries involved in the lottery.
It is Ireland's 11th EuroMillions jackpot winner and second in 2017, with a Dublin work syndicate scooping €88.5m in January.
The latest win brings to over €1bn the total amount in Irish EuroMillions wins since the game was launched in 2004.
The winning numbers were 11, 20, 35, 37 and 45 and the bonus numbers 3 and 6. The jackpot amount was €28,975,630.
The biggest win in Irish history was that of Limerick woman Dolores McNamara who picked up a cheque for more than €115m in 2005.
Her win made her the 58th richest person in the country overnight.
Meanwhile, a Meath man who decided to buy a Lotto ticket to cheer himself up after being turned down for a job ended up scooping €415,000.
The man, in his early 30s, said he felt deflated after failing to clinch the job after getting through two gruelling rounds at interview.
His luck changed when he matched five numbers plus bonus on the Lotto draw on Saturday, bagging himself a fortune.
Sitting in the National Lottery winner's room yesterday with his partner, he said: "I am still pinching myself after finding out.
"I couldn't wait to get into National Lottery HQ with my ticket as I was afraid I was going to lose it.
"Yes, I was fairly disappointed at not getting the job, as I thought the two stages of the interview, although tough, went really well. But you can rest assured, it's a distant memory now."