Some celebrities are born with famous names to match their famous faces and some opt to change them instead.
In the video above, Buzzfeed reveals the birth names of 10 celebrities one by one. Some names are easy to match (we're looking at you Demi Moore), while others are near impossible — cough Snoop Lion cough.
Name changes aren't just for celebrities, in Ontario anyone over the age of 16 can apply to legally change their name. But if that seems to permanent there's always the option of going with a stage name, stars like Tom Cruise (born Thomas Cruise Mapother IV) and Brad Pitt (born William Bradley Pitt) are two examples of stars who have become famous under a pseudonym.
And if these celebrities real names didn't shock you, here's a few more you might not have known.
Watch the video above to learn the birth names of popular celebrities then let us know how many you guessed correctly.
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