2012–2014: Beginnings In 2012, Ryu started acting in
short and
independent films, before being cast in a
bit part in the 2013 feature film
INGtoogi: The Battle of Internet Trolls.
2015–2017: Reply 1988 and breakthrough Ryu first drew attention for his performance in his debut
feature film,
Socialphobia in 2015, which earned him a Rising Star Award at KAFA Film Festival and nominations from
Chunsa Film Art Awards. Later that year, Ryu gained widespread public recognition through starring in the family drama
Reply 1988, alongside
Lee Hye-ri,
Park Bo-gum,
Go Kyung-pyo, and
Lee Dong-hwi. His performance won him many accolades, including the Best New Actor in TV Award at the
52nd Baeksang Arts Awards in 2016. In 2016, Ryu starred in the
coming-of-age film
One Way Trip and crime thriller
No Tomorrow. The same year, he played his first leading role in romantic-comedy
Lucky Romance alongside
Hwang Jung-eum. In 2017, Ryu featured in political crime drama film
The King alongside
Zo In-sung and
Jung Woo-sung, which became
the 7th highest-grossing South Korean film of the year and for which he won the Best New Actor in Film award at the
53rd Baeksang Arts Awards. which became the highest grossing Korean film of the year and the
twelfth highest-grossing South Korean film in history. Ryu also appeared in legal thriller film
Heart Blackened alongside
Choi Min-sik and
Park Shin-hye.
2018–present: Work in film and streaming media In 2018, Ryu starred in the acclaimed drama film
Little Forest with
Kim Tae-ri, and headlined the crime action film
Believer with
Cho Jin-woong .
Believer was a box-office hit, becoming the first Korean film to surpass five million admissions in 2018. It was the
fourth highest-grossing film of the year in South Korea. In 2019, Ryu starred in the action thriller film
Hit-and-Run Squad with
Gong Hyo-jin directed by
Han Jun-hee, led the crime film
Money alongside
Yoo Ji-tae and historical action film
The Battle: Roar to Victory directed by
Won Shin-yun. All three films performed well at the box-office, with
The Battle: Roar to Victory and
Money eventually becoming the
5th and 9th highest grossing Korean films of the year respectively. Ryu's film work earned him a spot in
Forbes Korea Power Celebrity for two consecutive years, 36th in 2018 and 11th in 2019. In 2021, Ryu starred in
JTBC's "Tenth Anniversary Special Project", a
Hur Jin-ho melodrama television series
Lost with
Jeon Do-yeon, marking his small screen comeback after five years. In 2022, Ryu headlined
Choi Dong-hoon's
sci-fi action fantasy film,
Alienoid, reuniting with
Kim Tae-ri. The film premiered in July 2022. Despite the film not being a commercial success, Ryu's performance was praised by critics. In November, Ryu starred in the historical-thriller film
The Night Owl, reuniting with
Yoo Hae-jin. In 2024, Ryu starred in
psychological thriller Netflix series
The 8 Show along with actress
Chun Woo-hee and actor
Park Jeong-min, reuniting second work with the director
Han Jae-rim. Ryu starred in the mystery thriller film
Revelations with actress
Shin Hyun-been and directed by
Yeon Sang-ho. In May 2025,
Netflix announced that Ryu will be one of the main characters of the new drama
The Rat, co-starring
Sul Kyung-gu. In June, Ryu signed an exclusive contract with United Artists Agency (UAA). ==Other ventures==