In Korea, most students finish high school at the age of 19. With that in mind, K-drama stars playing high schoolers must be of the same age too. However, with their youthful look, these overaged stars Kim Go Eun, Hwang In Yeop, and more were able to slay playing teen roles into their late twenties and early thirties!

1. Kim Go Eun

Thanks to her iconic role as the "Goblin's bride" in the hit 2016 fantasy-romance series "Goblin," Kim Go Eun made a huge success in her career. She played the character of Ji Eun Tak, a high school student who was struggling at the hands of her aunt.

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The actress was 25 years old at that time when she convinced the viewers that she does look like a bubbly teenager enjoying carefree days.

2. Hwang In Yeop

Famous for his role in "18 Again," this actor shocked many when he finally revealed his age. At the age of 29, Hwang In Yeop played another high school role in tvN's "True Beauty."

His young and appealing look indeed deceived many that he can pass as a student heartthrob.

3. Kim Jung Hyun

Before he landed big drama roles, Kim Jung Hyun captivated the viewers when he portrayed the high schooler, Hyun Tae Woon, in the KBS campus series "School 2017. He was 28 years old when he did this project.

4. Kim Hee Sun

Making it on the list is veteran actress Kim Hee Sun. In 2015, she starred in the MBC series "Angry Mom," where she immersed herself in the character of a high schooler Jo Bang Wool.

She surprised many with her role and wore that adorable school uniform at the age of 39. She was a mother who went undercover as a high school student.

5. Ryu Jun Yeol

This award-winning actor has worn different hats already, which earned him recognition from the public. When he played the role of Kim Jung Hwan in the coming-of-age tvN series "Reply 1988" in 2015, Ryu Jun Yeol was in his late twenties and yet looked young in those high school uniforms.

6. So Joo Yeon

Though many of the overaged high school stars are male, there are still some old female stars who've used their youthful looks and landed teen roles. Known for her character in "Dr. Romantic 2," So Joo Yeon also played a 17-year-old high school student in her recent Kakao M web-drama, "A Love So Beautiful", when she was at the age of 28.

7. Lee Dong Hwi

Joining Ryu Jun Yeol in the list is his "Reply 1988" co-star and real-life friend, Lee Dong Hwi, who was 31 years old when he took the role of teen Ryu Dong Ryong.

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Shai Collins wrote this.