One lucky UK ticket-holder has won the entire £76.3 million jackpot in Friday night's EuroMillions draw.
The National Lottery is urging players to check their tickets to see if they have won.
"We have plenty of champagne on ice ready to celebrate," National Lottery winners' adviser Andy Carter said.
The winning main EuroMillions numbers in Friday's draw are 05, 15, 17, 37, 44 and the winning Lucky Star numbers are 07 and 11.
One ticket-holder has all the numbers, winning a total of £76,369,806.80.
It is the biggest EuroMillions win since Aberdeen couple Fred and Lesley Higgins claimed nearly £57.9 million in July after having their ticket torn in two.
The biggest UK EuroMillions winner this year was an anonymous ticket-holder who banked £121 million in April, while in February another anonymous player won £77 million.
Currently the biggest lottery win in the UK is that of Colin and Chris Weir from Largs in North Ayrshire, who won £161 million on EuroMillions in 2011.
Mr Carter said buying a EuroMillions ticket helps to raise money for good causes.
"On average, around £30 million is raised every week for projects across the UK, both big and small, including funding everything from local community projects to preserving the nation's heritage," he said.