Did you know that before Elon Musk was worth $21 billion, he was a jumpsuit-wearing janitor? Or that Taylor Swift's former job was keeping Christmas trees free of insects?

It's hard to think about the world's most elite celebrities and geniuses flipping burgers at McDonald's – but everyone has to start somewhere.

While some of the stars, like Richard Branson, have said that being a low-paid employee taught them the value of hard work, others said exactly what countless others before them have said: it sucked.

So, from rags to riches, here are 10 celebrities who worked in very unglamorous jobs before they found their calling and caught wind in their sails:

Click To Share These Surprising Fun Facts With Your Friends – (Featured credits: Branson by Burdett Taylor, CC; and Swift by Dimitrios Kambouris for TAS and Getty)