2016–2018: Beginnings Song first appeared under
Namoo Actors in December 2016. Song made his acting debut with a supporting role in the 2017,
romantic comedy television series
The Liar and His Lover. The same year, he was cast in the family drama
Man in the Kitchen. He also appeared in two music videos: "Sweet Summer Night" by acoustic duo The Ade and "Love Story" by
Suran. Song hosted the
SBS music program
Inkigayo from February to October 2018 along with
Seventeen member
Mingyu and
DIA member
Jung Chae-yeon. He also joined as a fixed cast member on the variety show
Village Survival, the Eight. For the two works, he was nominated for the "Rookie Award" at the
2018 SBS Entertainment Awards. In July 2018, Song made his big-screen debut with the fantasy film
Beautiful Vampire.
2019–present: Rising popularity, leading roles, and military enlistment In 2019, Song played the supporting role of
Jung Kyung-ho's assistant in
tvN fantasy melodrama
When the Devil Calls Your Name. He next starred in the
Netflix original romantic series
Love Alarm, based on the popular webtoon of the same name. Song was cast in his first major role through auditions out of 900 people; he played the role of a handsome high-school student who falls in love with a girl played by
Kim So-hyun who was his best friend's secret crush.
Love Alarm was ranked as one of Netflix's top releases of the year and was renewed for a second season. His final appearance that year was in the music video of Vibe's "Call Me Back". Song was propelled to stardom in 2020 when he starred in
apocalyptic horror Netflix original
Sweet Home, based on the
eponymous webtoon. He went to auditions after
Love Alarm director recommended him to the director of
Sweet Home, Lee Eung-bok. Critical responses of the series were mixed, but gathered a wide international audience. A month after the release of the series,
Variety revealed that it had been viewed by 22 million member households of Netflix. At the
57th Baeksang Arts Awards Song received a nomination for
Best New Actor – Television. He played a ballet student who struggles due to unresolved issues about his father and tries to support himself by working as a part-timer. Song took
ballet lessons for six months in order to portray his character. Later the same year, Song starred in another webtoon adaptation,
Nevertheless,
JTBC's romance drama, alongside
Han So-hee. In terms of viewership record, 2021 was considered a success for Song as
Sweet Home,
Love Alarm, and
Nevertheless respectively ranked as fifth, sixth, and eighth most watched K-dramas in Netflix worldwide, respectively. In 2022, Song starred in another JTBC drama,
Forecasting Love and Weather, alongside
Park Min-young. On March 4, 2022, In 2023, Song took on a role in the Netflix series
My Demon, where he played the lead character alongside
Kim You-jung. ==Personal life==