It's not yet known if the ticket belonged to an individual or a syndicate...or what part of the UK the winner is from. The winning numbers were:
17, 19, 38, 42 and 45
Lucky Stars were 9 and 10.
A UK National Lottery spokesman said: 'This is amazing news - we are absolutely delighted that a UK ticket-holder has scooped the entire €185m euro jackpot, which at the current exchange rate is a massive £161m.
Until yesterday's draw, the largest lottery winner in the UK was an anonymous player who claimed £113m in the EuroMillions in October last year.
This win has over night catapulted them into 430th place in this year's Sunday Times Rich List sitting alongside David and Victoria Beckham (£160million) and self-made millionaire and Dragons' Den regular Theo Paphitis (£170million).
Rod Stewart worth €129 million.
Jamie Oliver worth £106 million
David Bowie worth £100 million.
What £161 can get you.....
Here are some ways the lucky person or syndicate could splash their gargantuan pot of cash...
A room with a view
A penthouse overlooking London's Hyde Park was reportedly sold for £135 million earlier this year. Apartments at luxury development One Hyde Park, in Knightsbridge, have an asking price upwards of £6,000 per square foot.
If they want the country's most expensive car, they could try to tempt Radio 2 DJ Chris Evans to part with his 1963 Ferrari 250 GTO. He splashed out £12 million for the mint condition antique last year. The winner could also opt for a fleet of 107 Bugatti Veyron Super Sports cars – the most expensive street legal car available on the market today.
Picasso's 1932 masterpiece Nude, Green Leaves and Bust fetched £70 million at an auction in New York last year – making it the most expensive work of art ever sold at auction.
For an exclusive getaway, they could buy Private Island Paradise, a 37-acre island in the Central Bahamas for £47 million. The isle boasts a luxurious manor house with it's own light house, a club-style dining and entertainment building with top-of-the-range gym, a heliport and infinity pool.
Their winnings could stretch to several thousands of bottles of the world's most expensive vintages. In 2005 a Methuselah of Cristal Brut 1990 sold at auction in New York for £11,267.
If the winners fancy a snack to accompany the fizzy stuff, they could nibble on the priciest caviar in the world. A kilo of Almas caviar costs £16,000 and comes in a 24-carat gold tin.
The Hublot Black Caviar Bang wrist watch is encrusted with more than 500 rare white diamonds and boats and 18 carat white gold case. They are a snip at around £630,000 each – meaning the winner can afford 255.
The winner could also buy six £24,250,000 Bombardier Global Express XRS executive jets.