18 Again poster

18 Again

"You're young again. You're at an age full of dreams and hope. What's your dream now that you're young again?"

TV Show 2020 1h 10m/ep 8.3 /10 Ended
JTBC A JTBC Original
Created by Ha Byung-hoon, An Eun-bin, Choi Yi-ryun

In a marriage that's fraying and a career stuck in a rut, a man faced with the dull ache of everyday life gets a second chance when his fate sends him back to his 18-year-old body. He wakes up in a world that looks, sounds, and feels different, yet carries the weight of his adult memories. Intent... Read more

Where to Watch "18 Again"

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Streaming availability last verified: January 24, 2026

About 18 Again

In a marriage that's fraying and a career stuck in a rut, a man faced with the dull ache of everyday life gets a second chance when his fate sends him back to his 18-year-old body. He wakes up in a world that looks, sounds, and feels different, yet carries the weight of his adult memories. Intent on mending broken bonds and finding purpose, he enrolls in a high school where he must pretend to be a new student while secretly rethinking every choice that shaped his family. The tension blends warmth with wit as the man tests long buried desires, confronts regrets, and discovers what really matters. The tone stays hopeful even as the protagonist wrestles with tough truths.

Directed by Ha Byung-hoon, 18 Again reimagines the 2009 film 17 Again for a Korean setting. The 2020 series aired on JTBC and streamed in regions. It is written by Ha Byung-hoon with Kim Do-yeon and An Eun-bin guiding the project.

Awards: The series earned nominations at major Korean award ceremonies, recognizing its performances and the blend of humor with emotional depth. Lead actors Lee Do-hyun and Kim Ha-neul were highlighted for their dual roles, and the ensemble earned praise for timing and warmth throughout the season.

Cultural Impact: The premise prompted conversations about midlife reinvention and family resilience, pairing funny scenes with genuine emotion. Viewers praised the chemistry between the leads and the show's willingness to place real concerns inside a light entertaining format that could appeal to different generations worldwide too today.

Reception & Themes: The drama drew positive attention for balancing sci fi elements with heartfelt family drama. Audience reaction noted its warm humor and performances, reflected in an 8.3 out of 10 rating from 253 votes. The show tackles identity, forgiveness and the meaning of renewal for many viewers today.

Details

Release Date
September 21, 2020
Episode Length
1h 10m
User Ratings
253 votes
Type
TV Series
Seasons
1
Episodes
16
Network
JTBC
Status
Ended
Genres
Drama, Comedy, Sci-Fi & Fantasy
Country
South Korea
Studio
JTBC Studios
External Links
View on IMDB

Official Trailer

Cast

Lee Do-hyun

Lee Do-hyun

Hong Dae-young / Go Woo-young

Kim Ha-neul

Kim Ha-neul

Jung Da-jung

Yoon Sang-hyun

Yoon Sang-hyun

Hong Dae-young (37 years old)

Roh Jeong-eui

Roh Jeong-eui

Hong Shi-ah

Ryeoun

Ryeoun

Hong Shi-woo

Wi Ha-jun

Wi Ha-jun

Ye Ji-hoon

Kim Kang-hyun

Kim Kang-hyun

Go Deok-jin

Lee Mi-do

Lee Mi-do

Choo Ae-rin

Han So-eun

Han So-eun

Young Jung Da-jung

Choi Bo-min

Choi Bo-min

Seo Ji-ho

Created by: Ha Byung-hoon, An Eun-bin, Choi Yi-ryun

Seasons (1 season, 16 episodes)

Season 1

Season 1

16 episodes - 2020

Frequently Asked Questions

18 Again is not currently available to stream, rent, or buy online in the US. Check back later for updates.

18 Again has 1 season with a total of 16 episodes.

With a rating of 8.3/10 from 253 viewers, 18 Again is highly recommended and considered excellent by most viewers.

In a marriage that's fraying and a career stuck in a rut, a man faced with the dull ache of everyday life gets a second chance when his fate sends him back to his 18-year-old body. He wakes up in a world that looks, sounds, and feels different, yet carries the weight of his adult memories. Intent...

18 Again stars Lee Do-hyun, Kim Ha-neul, Yoon Sang-hyun, Roh Jeong-eui, and Ryeoun.

18 Again was created by Ha Byung-hoon, An Eun-bin, and Choi Yi-ryun.

18 Again was released on September 21, 2020.

18 Again is a Drama, Comedy, and Sci-Fi & Fantasy series.

18 Again follows a middle-aged man who is transformed back into his 18-year-old body, giving him a second chance to navigate his marriage and career. The series blends drama, comedy, and sci-fi & fantasy.

Lee Do-hyun plays Hong Dae-young and his 18-year-old self Go Woo-young. Yoon Sang-hyun plays the 37-year-old Hong Dae-young. Kim Ha-neul stars as Jung Da-jung.

18 Again has 1 season with 16 episodes and is listed as Ended, so there isn’t a second season planned.

Ha Byung-hoon, Kim Do-yeon, and An Eun-bin are credited as creators. The series blends drama, comedy, and sci-fi & fantasy.