Anyone who bet £20 on Leicester City FC winning the Premier League at the start of the season just won £100,000 ($145,877) on Monday, according to betting company Ladbrokes.
The club claimed the title after Tottenham drew with Chelsea on Monday night.
Ladbrokes told Business Insider that there were 47 bets on Leicester winning the league at the start of the season, each with odds at 5,000/1.
Of those 47 bets, 24 still stood.
The smallest Leicester-backing bet was just 10p, which won £500 in what Ladbrokes calls “surely the best use of 10p ever.”
Other bets still riding included a number of £10 and £5 gambles, which won £50,000 and £25,000 respectively.
Ladbrokes said it will pay out around £3 million as a result of Leicester winning the title.
“We have been taking bets for 130 years and we have never ever seen anything come even close to this,” a Ladbrokes representative told Business Insider.
“It’s rare to see a 5,000/1 shot and even rarer to see one even have a slim chance of winning. This is unprecedented and there are no comparisons whatsoever.
“We salute the fans who backed their side to land the biggest upset in history at the start of the season.”