How old 17 self-made billionaires were when they made their first million

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Mark Zuckerberg had $1 million in the bank at the ripe age of 22, while Larry Ellison didn't reach millionaire status until age 42. Today, they're both billionaires.

Some successful entrepreneurs strike it rich early on. For others, it takes decades.

Using an infographic from UK-based web platform Fleximize, we've broken out the age at which Zuckerberg, Ellison, Cuban, and other self-made billionaires made their first million.

Mark Zuckerberg: 22

The Facebook cofounder and CEO became a millionaire in 2006 at age 22.

It didn't take long for him to make the leap from self-made millionaire to billionaire. At the age of 23, Facebook's IPO made Zuckerberg the youngest self-made billionaire in history.

Today's estimated net worth: $43.9 billion

Evan Spiegel: 23

The Snapchat cofounder and CEO became a millionaire in 2013 at age 23.

Two years later, the value in his Snapchat shares reached $1 billion, making him a 25-year-old self-made billionaire.

Today's estimated net worth: $2.1 billion

Sir Richard Branson: 23

Britain's high-profile billionaire earned his first million in 1973 at age 23.

Nearly two decades later, the Virgin Group founder reached self-made-billionaire status at age 41.

Today's estimated net worth: $5.1 billion