There's a new big online casino winner out of the William Hill Casino. This time, it was a 29-year-old stable hand, named Olesia Kuzmychova, who claimed an incredible progressive jackpot slots win of £240,000 - that's nearly $400,000 in US Dollars.

The Ukrainian woman, who now lives and works in Britain, had been having a bad day when she placed a 20 pence bet on Leprechaun's Luck, a progressive slots game. That's when she won the jackpot, totalling precisely £238,155.

According to Kuzmychova, she placed the bet on the slots game at William Hill Casino and, “The next thing I know, I hit the jackpot! I was screaming like crazy. This has completely changed my life.”

Kuzmychova was working as a stable hand in Newmarket, Suffolk, earning just £290 per week, so this big progressive jackpot slots win has truly changed her life. She reportedly plans to spend the money on her wedding to former horse jockey, William Rovetti, in addition to a vacation to visit Olesia's family, who still lives in Ukraine.

Notably, William Hill Casino is currently offering deposit bonuses of up to £150 to new members. In addition, there's also a $25 bonus for members who opt to play at the live casino. And you never know if you could be one of the casino’s next big winners!