A Dublin shop sold last night's winning Euromillions ticket, now worth €175 million.
The largest ever lotto jackpot winner in Ireland bought the ticket in Reilly's Daybreak in Naul.
The large family syndicate from the Naul say it will take them some time to get their heads around the win.
The family also has ties in Duleek and Bellewstown in Meath.
They plan to share the money with children, grandchildren and extended family.
They have said they don't want it to change their lives.
A statement from the National Lottery says the mostly retired family are very close, meet every week and take holidays together.
A Lotto Spokesperson said the ticket holder was very composed when she called lotto headquarters this morning.
Reilly's Daybreak in Naul Will be celebrating
The last biggest win was the €115m won by Dolores McNamara in 2005.
This massive record Euromillions Irish win will make them the 94th richest person in the country.
They leap frog on to Ireland's rich list ahead of Enya, who has €165m.
