These before-and-after photos show tech billionaires' dramatic transformations

AP/Andy Rogers and Getty/Drew Angerer

Jeff Bezos' look has changed quite a bit since the early 2000s.

Tech CEOs used to be infamous for their lack of style.

But a photo revealing how much Amazon CEO Jeff Bezos has changed over the years shows that the stereotype is changing.

Here are 12 photos that prove how time and success changed some of tech's most famous CEOs.