The estimated £202million jackpot would put the winner well ahead of superstar singer Adele, thought to be worth £175million.
It would also make them twice as rich as tennis legend Sir Andy Murray on £100million and put £75million footballer Harry Kane in the shade.
The cash prize is close to the estimated wealth of golfer Rory McIlroy (£225million), based on last year's Sunday Times Rich List.
The jackpot record is held by an anonymous player who took home £195million on July 19, 2022.
Two months earlier, Joe and Jess Thwaite, from Gloucester, won a then record-breaking £184,262,899 with a Lucky Dip for the draw on May 10, 2022.
The UK's third biggest win came after an anonymous ticket-holder scooped the £177million jackpot in the draw on November 26.
No one won the £182million EuroMillions jackpot on Tuesday, meaning the top prize rolls over into Friday's draw.
Andy Carter, winners' adviser at lottery operator Allwyn, is all set to counsel a new plutocrat.
He said: "Tomorrow night...