Fresh from celebrating their win, the couple from County Armagh in Northern Ireland, will speak about their plans for the money in Belfast later this morning.
They won a total of £114,969,775.70, making them the fourth biggest UK lottery winners in history.
In the New Year's Day draw 10 other players took home £1 million in prize money each.
The winning main EuroMillions numbers were 01, 08, 11, 25, 28 and the winning EuroMillions Lucky Star numbers were 04 and 06.
The New Year's Day win follows a series of high-profile lottery prizes in recent years.
In July 2011, Colin and Chris Weir, from Ayrshire, Scotland, became the biggest lottery winners in the UK, and across Europe, when they scooped more than £161 million.
Adrian and Gillian Bayford, from Suffolk, took home more than £148 million in August 2012.
And last November, builder Andrew Clark, 51, from Boston, Lincolnshire, discovered he had won £76 million, six weeks after the draw.
He said he stockpiled tickets in his van, only checking them every three months.
Recalling the evening he found the ticket, he said: "I finally gave in, got the bundle out of the van and started to work my way through them, methodically from the oldest to the most recent, starting with Lotto, before moving on to my EuroMillions tickets.
"You might say I was slightly winding up Louise but I certainly didn't expect the wind up to end with me saying 'I've done it, I've won £76m' – I won't say what she said in response!"
The biggest win for 2018 was £121million which was handed to an anonymous winner in April.
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