Mel Morris, a 58-year-old entrepreneur, is set to make an estimated £520 million when the firm behind Candy Crush floats on the stock exchange. He is already worth millions, but this move will make this ex-flooring salesman one of Britain's richest men.
So how did he get to this point? And how long does it take to be an overnight success?
According to the Daily Mail, Morris started out as an entrepreneur of a very different kind. He left school at 16 and set up a flooring and property company in Spain.
His online move came in 1998 when he set up dating website uDate. He eventually sold the company for £100 million in 2003 - personally making £20 million from the sale.
The Derby Telegraph reported that he used the money for a variety of things - setting up an internet security company (which he eventually sold for £10 million), joining a consortium which took over Derby County football club, and buying 12% of King Digital Entertainment.
The company went on to make Candy Crush, which became a global phenomenon, and last year was the most downloaded free app online.
Overnight?Clearly this was no overnight success, but a portfolio built up over 30 years which is paying dividends. However, some multi-millionaires can do it far faster.
Pete Cashmore is only 27 and is worth over £60 million. The blogger behind Mashable started at the age of 19, and now his news and technology website receives 25 million hits a month and employs 120 people. He's said to be worth over £60 million.
Nick D'Aloisio sold his company to Yahoo last year. He got $30 million for his news summary service Sumly - and a job with the tech company. The Australian is 18-years old.
And Catherine and David Cook started even younger. The brother and sister behind MyYearbok.com came up with the idea of an online yearbook when Catherine was just 15. They do not discuss how much their stake in the company is worth, but it is estimated to be well over $1 million.