Airbnb CEO Brian Chesky: Life and rise ahead of the company's 2020 IPO

Airbnb announced Thursday its plans to go public in 2020.

Brian Chesky is the company's cofounder and CEO, and is worth an estimated $4.2 billion.

Here's everything you need to know about the 38-year-old Chesky, a former bodybuilder who has grown Airbnb into a $31 billion company in just over 10 years.

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Brian Chesky didn't know much about tech before starting Airbnb.

The now-38-year-old CEO majored in industrial design in college, and dabbled in hockey and bodybuilding in his 20s. But now, he's grown an idea that stemmed from overbooked hotels into a multi-billion-dollar startup, and has become one of Silicon Valley's key players.

On Thursday, Airbnb announced it was planning to go public in 2020, the latest step for a company last valued at $31 billion.

Here's how the Brian Chesky, an upstate New York native, became one of the richest young tech founders in America: