Social networks were the first to reveal rumours that a massive £161m EroMillions jackpot had been scooped up by someone in the UK after the draw and a National Lottery spokesperson confirmed Britain had produced Europe's biggest lottery winner.
The winner matched five main numbers and both the Lucky Stars to take the huge jackpot, which had been capped after a series of rollovers made it the largest ever in the UK. No details about the winner were revealed.
Until last night's draw, the biggest UK lottery winner was an anonymous player who claimed £113m in the EuroMillions in October.
A Camelot spokeswoman said: "We've got the champagne on ice and look forward to welcoming the ticket-holder."
The winning numbers were 17, 19, 38, 42, 45 with lucky stars 9 and 10.
The 11 ticket holders who missed one lucky star will each pick up €2,435,077, worth around £2.1m.
It is not known whether the latest overnight millionaire was an individual or in a syndicate. Camelot has not said where they come from in the UK.