Last night's €5.3 million Lotto jackpot was won in Co Cork.
Ticketholders in the county are being urged to check their numbers today.
The winning numbers were 06, 08, 13, 15, 21, 30 and bonus number 17.
It's the seventh Lotto jackpot won this year, with last night's jackpot amounting to €5,325,592.
National Lottery spokesperson Robert Magee said: "It's some really good news to wake up to this morning - and as across the country and in Co Cork many people are getting up early to watch the Ireland v Scotland game.
"If it is you who has those numbers, just make sure you keep that valuable piece of paper very, very safe and contact the National Lottery prize claims team tomorrow morning."
He also urged the lucky ticketholder to sign the back of their ticket, and to "try to stay calm" after the win.
