What do an Italian communist student of mime, a toddler with an eye for a ball and a comedian who jokes about nothing have in common?
They all went on to become members of a very select global club.
Miuccia Prada, Tiger Woods and Jerry Seinfeld are among about 2,800 people on the planet who are US-dollar billionaires.
But the list of super-rich is very international.

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According to the American media firm Forbes, which tracks the fortunes of the world's richest, the United States has 813 billionaires, China (including Hong Kong) is second with 473, and India is third with 200.

The BBC World Service podcast Good Bad Billionaire is back. From celebs and CEOs to sport stars and tech titans, each episode looks at how some of the world's billionaires made their fortunes. Presenters Simon Jack and Zing Tsjeng consider their wealth, power, philanthropy and legacy, and whether they think they are good, bad or just incredibly rich.

The size of these fortunes can be hard to comprehend. A billion is a huge number - to give an idea of scale, one million seconds is 11 days, but a billion is 32 years.
And for some, the very existence of billionaires is obscene.
Eighty-one of the world's richest people - about a bus-full - have more combined wealth than the poorest four billion people in the world.
In a 2023 report on inequality, Oxfam concluded: "Every billionaire is a policy mistake. The very existence of booming billionaires and record profits, while most people face austerity, rising poverty, and a cost-of-living crisis, is evidence of an economic system that fails to deliver for humanity.”
That inequality has led to calls in many countries for taxes on absolute wealth rather than income. In the US, Democratic Party Senator Elizabeth Warren proposed a 2% tax on assets over $50m (£39m) and 3% on assets over $1bn (£778m).