According to Sky News, a UK ticket holder has stepped forward to collect the massive £177 million prize from Tuesday's EuroMillions draw.
If verified, the claim will make them the third-largest National Lottery winner ever. It will now go through a confirmation process.
After then, the award will be given out during a meeting with an adviser for National Lottery winners.
The ticket-holder will be able to decide whether they share the news publicly or not.
The jackpot will make them wealthier than singer Harry Styles and heavyweight boxer Anthony Joshua, who are both worth £175m, according to the latest Sunday Times Rich List.
The winner is behind an anonymous UK ticket-holder who scooped the record EuroMillions jackpot of £195m in July 2022.
In May of the same year, Joe and Jess Thwaite, from Gloucester, won £184,262,899 with a Lucky Dip ticket, and are the second-highest winners.
Andy Carter, senior winners' adviser at Allwyn, operator of the National Lottery, said: "We are delighted that we have received a claim and will now ensure the ticket-holder gets all the support they need.
"This is a truly amazing win, and we will focus on guiding them through the process and helping them to start to enjoy their life-changing win.
"The team here has huge experience of guiding all of our lucky National Lottery winners through the first steps in their journey of embracing their win."