Full cast of 18 Again

Lee Do-hyun

Hong Dae-young / Go Woo-young

16 episodes

Kim Ha-neul

Jung Da-jung

16 episodes

Yoon Sang-hyun

Hong Dae-young (37 years old)

16 episodes

Roh Jeong-eui

Hong Shi-ah

16 episodes

Ryeoun

Hong Shi-woo

16 episodes

Wi Ha-jun

Ye Ji-hoon

16 episodes

Kim Kang-hyun

Go Deok-jin

16 episodes

Lee Mi-do

Choo Ae-rin

16 episodes

Han So-eun

Young Jung Da-jung

16 episodes

Choi Bo-min

Seo Ji-ho

16 episodes

Hwang In-yeop

Goo Ja-sung

16 episodes

Kim Yoo-ri

Ok Hae-in

16 episodes

Lee Ki-woo

Choi Il-kwon

16 episodes

Ahn Nae-sang

JBC Director

16 episodes

Yoon Byul-ha

Ye Seo-yeon

16 episodes

Ko Eun-min

Lim Ja-young

16 episodes

Kim Sun-min

Choi Il-kwon [Young]

16 episodes

Woo Sang-hee

Seo Soo-rin

1 episode