It was recently revealed that Jung Chan Woo, the actor who played the young Lee Min Ho in "The Heirs" also played his much younger version in "Boys Over Flowers."

Jung Chan Woo was one of four young actors who helped show F4 as small adorable toddlers rather than privileged bullies.

Kdramas regularly use child actors to offer some perspective on characters. In the case of "The Heirs" that actor helped show how Kim Tan and Choi Young Do became enemies.

Or flashbacks with child actors can show the events that set the character on the course he or she later follows.

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