EuroMillions offers mega money prizes, with the maximum �190million jackpot twice scooped by a single winning ticket - once bought in Spain and once in Portugal.
With the jackpot expected to hit �154million, one of the biggest ever, a winner would be able to buy supercars, mansions, have expensive holidays and never work a day again in their life.
It would mean they would be worth way more than singer Adele (�125million) and George Clooney and Formula One star Lewis Hamilton, who are both worth �131million.
Here are biggest UK winners since the lottery began:
1. Colin and Chris Weir: �161,653,000
The husband and wife, from Largs in Ayrshire, said they were "tickled pink" after becoming Europe's biggest lottery winners in July 2011.
Married for 30 years and with two children, the life-changing �161 million prize catapulted them into the Sunday Times Rich List above Beatle Ringo Starr and Sir Tom Jones.
Psychiatric nurse Mrs Weir, 55, and Mr Weir, 64, who worked as a TV cameraman and studio manager for 23 years, bought a mansion - which they later upgraded to a bigger one nearby - and a fleet of cars.
Football fan Colin helped refurbish Largs Thistle�s ground and gave more than �1million to Partick Thistle so they could set up a youth academy and clear debts.
The Weirs also gave �1million to the National Theatre of Scotland to help pay for a new HQ in Glasgow. And they have made three �1million donations to the SNP since their 2011 win. They also set up a charitable trust after their win, supporting Scottish-based community groups and charities
2. Adrian and Gillian Bayford: �148,656,000
Children's nurse Gillian, 40, and record seller Adrian, 41, from Haverhill, Suffolk, said they planned to fork out on luxury holidays and cars when they won in August 2012.
Adrian joked to his wife that he had not bought any tickets, before she told him to be quiet as she was trying to get their children to sleep as he celebrated the win.
The pair split 15 months after their win, although they remained on god terms. Adrian moved into a grade-II listed Georgian mansion with 90 acres of land - which came in handy when he staged the Cambridge Rock Festival in the grounds to save it from being cancelled.
Adrian got together with stable girl Sam Burbidge in February 2014, whisking her away on a Maldives holiday - and popping the question after just two weeks. But they split three years into the engagement.
Gillian found new love with car salesman Alan Warnock after the break up of her marriage.
Neil Trotter - �107,932,603.20
Neil celebrated his EuroMillions jackpot win in 2014 and joked, "being Trotters we were always going to be millionaires one day!"
The car mechanic and racing driver from Coulsdon thought he had heard every Only Fools and Horses joke but said, "I can see this is going to run and run."
In an eerie premonition he had told staff at his Dad�s office on the day of his win that �this time tomorrow" he�d be a millionaire.
Just hours later he saw his EuroMillions Lucky Dip make him the fourth biggest lottery winner in the country.
He bought a Grade II-listed mansion with its own lake and 400 acres of land.
The Davies family from Monmouth - �61,102,442
Sonia Davies was in Florida with partner Keith Reynolds recovering from an operation to remove a tumour from her parathyroid gland when she found out she had won in a family syndicate.
She had just had the all clear so asked her sales executive daughter Stephanie, at home in Wales, to buy a ticket - and she went for six lucky dips. Stephanie's boyfriend Steve and daughter Courtney were also part of the win.
Student Courtney vowed to buy a new electric toothbrush and replace her car with her �12million share.
Cassey Carrington: �45,160,170
Cassey, 22, from Stapleford in Nottingham, banked the staggering total after matching all five numbers and two Lucky Stars in a EuroMillions draw in February 2012.
The Iceland store supervisor said she planned to marry painter fiancee Matt Topham, 22, in September following the Lucky Dip win. They became the second couple from the county to bank the jackpot in less than a month.
