18 Again
18 어게인
- Ended
- 2020
- 16 episodes
- 70 min per episode
- Drama
- Comedy
- Sci-Fi & Fantasy
- In Korea on JTBC
Where to watch 18 Again in the US
18 Again isn't currently available on any subscription platform in the US.
Availability updated November 7, 2026.
18 Again TV ratings in Korea
In Korea 18 Again averaged a 2.73% audience share over 16 episodes, peaking at 3.21% with episode 5 (Nielsen Korea, nationwide).
Source: Nielsen Korea data as reported by Wikipedia
18 Again plot
At a difficult place in his marriage and career, a middle-aged man gets a shot at a do-over when he's transformed back into his 18-year-old body.
18 Again cast
Lee Do-hyunHong Dae-young / Go Woo-young
Kim Ha-neulJung Da-jung
Yoon Sang-hyunHong Dae-young (37 years old)
Roh Jeong-euiHong Shi-ah
RyeounHong Shi-woo
Wi Ha-junYe Ji-hoon
Kim Kang-hyunGo Deok-jin
Lee Mi-doChoo Ae-rin
Han So-eunYoung Jung Da-jung
Choi Bo-minSeo Ji-ho
Hwang In-youpGoo Ja-sung
Kim Yoo-riOk Hae-in