A winning Euromillions ticket was sold online to someone based in Leinster, the National Lottery has revealed.
The winning numbers for Tuesday's draw were 14, 15, 24, 29, 42 and the Lucky Stars were 02, 04.
The ticket scooped the jackpot of over €49.5m.
Online players in the Leinster area are being urged to check their accounts and e-mails.
The winning ticket was a €2.50 Normal Play selection - meaning the lucky player selected their own winning numbers.
The National Lottery has confirmed that a notification to the user’s online account and a separate e-mail has been sent to the ticketholder.
A National Lottery spokesperson said: "This lucky ticketholder in Leinster has woken up this morning to an e-mail to confirm that they are the lucky winner of last night's €49.5m EuroMillions jackpot.
"We are still waiting to hear from this winner - so we are encouraging all of our online user's in Leinster to check their accounts and e-mails, and if they are the winner to get in touch so we can officially begin the prize claims process.
"€49.5 million really is a life changing sum of money so we will be carefully guiding this winner through this prize claims process over the course of the coming weeks to ensure that they are fully prepared when claiming this massive prize."
The National Lottery also confirmed it has started the process of drawing down the jackpot funds from the other nine participating lotteries.
It expects to be in a position to pay out the prize next week.
