In South Korea, age seems to be just a number on the Korean entertainment scene. If you haven’t noticed, the debut age of idols have been getting younger – two of NCT-Dream members are only 15! But it’s not a new phenomenon. In fact, some of the well-known celebrities who are not even 30 have chalked up more than a decade’s worth experience! Here are 10 celebs you probably didn’t know debuted when they were really young.

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