Camelot had already confirmed the winning ticket, worth an incredible £170,221,000, was bought in the UK.
Where the ticket was bought or whether the winner is an individual or a syndicate will not be revealed unless the ticket-holder decides to go public.
Camelot will pay out the prize following a meeting to validate the ticket.
It is then up to the winner to decide whether or not to share their news.
The top prize had grown to the record-breaking amount because it had not been claimed since July and rolled over for the previous five draws after it reached its limit.
The winner matched all five main numbers – 07, 10, 15, 44, 49 – and the two lucky stars – 03 and 12.
They had 180 days from the draw to claim the prize.
This is the fifth time a UK player has won the EuroMillions jackpot this year. The previous winner, who remained anonymous, scooped £123m in June.
Patrick and Frances Connolly from Northern Ireland won the £114.9m EuroMillions jackpot in the draw on New Year’s Day.
Ade Goodchild banked £71m in March and an anonymous ticket-holder bagged £38.2m in April.
The previous biggest winners in the UK were Colin and Chris Weir from Largs, Ayrshire, who won £161m in July 2011.
Andy Carter, senior winners’ adviser at The National Lottery, said: “This is the biggest win ever on The National Lottery and we look forward to helping the ticket-holder start to enjoy their new found wealth.”
According to the Sunday Times Rich List, the winner, if it is just one person, would become one of the wealthiest people in the UK and have more money in the bank than music legends such as Tom Jones and Ed Sheeran.
Previous big winners:
- Colin and Chris Weir from Ayrshire in Scotland: £161,653,000 (July 2011)
- Adrian and Gillian Bayford from Haverhill in Suffolk: £148,656,000 (August 2012)
- Anonymous winner: £123,458,008 (June 2019)
- Anonymous winner: £121,328,187 (April 2018)
- Patrick and Francis Connolly from Moira in Northern Ireland: £114,969,775 (January 2019)