Wiam Najjar

I don't know if she's been mentioned already, but Kim So Hyun is one of my favorite actresses under 18 along with Kim Sae Ron

Yeo Jin Goo ain't a child actor ANYMORE :D He's turning 20 this year (OMG THE TIME FLIES)

Out of the child actors/actresses who are still under 18 (and haven't been mentioned on the comments yet) my favorites would be Jung Da Bin, Choi Ro Woon, Kal So Won and Hong Eun Taek & Hong Hyun Taek brothers ^^

There are many of course but those are the ones I remember the best :)

And I have to mention ALL the kids who were in Six Flying Dragons !

Jin Ji Hee is a really good actress. I was quite surprised in High Kick, her acting seems so real!

love this, because I am in awe of so many of these children. The quality of their performances is mind boggling. Lee Chae-Mi in Two Weeks, Nam Da-Reum from 6 Dragons and Memory, quickly came to mind, but there are so many! Yeo Jin Goo is my personal favorite. Immense talent that child!

I've only seen young Princess Nang Rang. I've had no idea she grew into this beautiful lady :)

I've also seen JIS in the 'unrepeatable excruciating experience'. I hope to God they start giving her roles where she isn't abused.

I like that when you write these articles you don't start by the obvious choices (eg. KSR, KSH, KYJ....). Otherwise, these brilliant actors would've totally went under the radar.

Oh My God, I know what you mean! Sometimes the kid actors outshine even the main leads/older actors! Some kids are just so talented! They make me wonder what the hell did I do growing up? xD

Anyways, I love this list. Can't wait to see more kid actors/actresses on it!

I love Jin Ji Hee and Kang Min Ah since I saw Seonam Girls HSI. They did amazing performances, specially Ji Hee in the scenes with her demanding mother

Agreed !!

You gotta add Yeo Jin Goo! And Kim Yoo Jung! Those two are great! I 1st saw them both in The Moon that Embraces the Sun (along with Jin Ji Hee) and loved them!

Kim Sae Ron from currently airing Mirror of the Witch is also real good! ^^

Kim So Hyun, she's everywhere XD but still like her, pretty and talented ❤❤❤

Ditto. I especially love Kim Sae Ron.

I think the most well known are:
Kim Sae Ron
Kim Yoo Jung
Kim So Hyun
Yeo Jin Goo
and I liked everything they starred in :)

Kang Minah also played as Kang Yoon Do's friend in Cheer Up/Sassy Go Go and also played as lead female in Cha Haekyeon's web drama (I forgot the name)

You also need to mention Kim So Hyun, Kim Yoo Jung!!