But that doesn't mean we all require the same amount of shut eye every night.

Everyone is different when it comes to how much sleep they need, reports INSIDER's Sarah Schmalbruch.

Generally speaking, 7.5 hours a night is a pretty average number.

However, many famous individuals tend to skimp on the rest, staying up late and waking up at ungodly hours in order to get a head start on the rest of us.

It's a trend that some business execs like Thrive Global founder Arianna Huffington are pushing back against by encouraging people to take sleep seriously.

Here's a list of how much sleep 15 successful people usually get, from the famously sleep-avoidant US President Donald Trump to Oscar-winning actor Matthew McConaughey, who always gets in more than eight hours:

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