Song made his acting debut with a supporting role in the 2017, romantic comedy television series The Liar and His Lover.[3] The same year, he was cast in the family drama Man in the Kitchen.[4] He also appeared in two music videos: "Sweet Summer Night" by acoustic duo The Ade and "Love Story" by Suran.[5][6]
In 2019, Song played the supporting role of Jung Kyung-ho's assistant in tvN fantasy melodrama When the Devil Calls Your Name.[11] He next starred in the Netflix original romantic series Love Alarm, based on the popular webtoon of the same name.[12] Song was cast in his first major role through auditions out of 900 people;[13] 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.[14]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".[15]
Song at the press conference for When the Devil Calls Your Name, July 2019
Song was propelled to stardom in 2020 when he starred in apocalyptic horror Netflix original Sweet Home, based on the eponymous webtoon.[16] He went to auditions after Love Alarm's director recommended him to the director of Sweet Home, Lee Eung-bok.[16] His role was Cha Hyun-su, a suicidal high school boy who, along with a group of fellow apartment residents, tries to survive a "monsterization" apocalypse.[17] Critical responses of the series were mixed,[18] but gathered a wide international audience.[19] A month after the release of the series, Variety revealed that it had been viewed by 22 million member households of Netflix.[20] At the 57th Baeksang Arts Awards Song received a nomination for Best New Actor – Television.[21]
In 2021, Song reprised his role as Hwang Sun-oh in the second season of Love Alarm which was released on Netflix on March 12. He also appeared in the TVN series Navillera, adapted from the eponymous webtoon.[22] 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.[23] Later the same year, Song starred in another webtoon adaptation, Nevertheless, JTBC's romance drama, alongside Han So-hee.[24]
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.[25]
On February 29, 2024, Namoo Actors announced that Song will enlist to fulfill his mandatory military service as an active duty soldier on April 2, 2024.[28]
In 2020, Song was selected as brand ambassador for South Korean cosmetics brand Banila Co..[29] In 2021, Italian luxury fashion house Prada announced that Song was selected as a brand ambassador.[30][31][32] In 2022, he was also selected as the brand ambassador for Bobbi Brown Cosmetics in the Asia-Pacific region.[33][34] The same year, Song was named as Penshoppe's global ambassador.[35]
^ abLee, Seung-gil (October 11, 2023). '마이 데몬' 김유정·송강 주인공 캐스팅...美친 비주얼의 만남 [공식] ['My Demon' Kim Yoo-jung and Song Kang cast as main characters... Meeting of beautiful visuals [Official]] (in Korean). MyDaily. Archived from the original on February 29, 2024. Retrieved October 11, 2023 – via Naver.
^Ha, Ha-jung (June 18, 2024). '탈주' 송강→이솜, 주연배우 못지 않은 화려한 특별출연 ['Escape' Song Kang → Lee Som, special appearance as spectacular as the main actors]. OSEN (in Korean). Retrieved June 22, 2024 – via Naver.
^Kim, Ga-young (June 15, 2022). '스위트홈' 시즌2·시즌3 동시 제작...송강→오정세 출연 확정 [공식] ['Sweet Home' Season 2 and Season 3 Simultaneous Production... Song Kang → Oh Jung-se confirmed to appear [Official]] (in Korean). Edaily. Archived from the original on June 15, 2022. Retrieved June 15, 2022 – via Naver.
^Jo, Min-jung (March 11, 2024). "입대 전 마지막 활동" 송강, '아이랜드2' 스토리텔러 맡아 ["Last activity before enlistment" Song Kang takes on the role of storyteller for 'Island 2']. Sports Chosun (in Korean). Retrieved August 31, 2024.
^Jeon, Hyo-jin (March 7, 2018). [DAY컷] '이옵빠몰까'이상형 종합 선물 세트 포스터 공개 [Day Cut: 'I Oppa Don't Know' Ideal Type Comprehensive Gift Set Poster Released] (in Korean). Sports Donga. Archived from the original on September 27, 2022. Retrieved February 8, 2022 – via Naver.
^"ACA 2021Nominations 2021". Asia Content Awards (in Korean). September 24, 2021. Archived from the original on October 7, 2021. Retrieved September 24, 2021.
^Kang, Hyo-jin (October 7, 2021). 아시아콘텐츠어워즈, '무브 투 헤븐'·'스위트홈' 3관왕→이제훈 올해의 배우상 '영예'[종합] [Asia Contents Awards, 'Move to Heaven' and 'Sweet Home' 3 crowns → Lee Je-hoon Actor of the Year Award 'Honor' [General]]. SpoTV News (in Korean). SpoTV. Archived from the original on October 7, 2021. Retrieved October 7, 2021 – via Naver.
^Choi, Ji-eun (April 27, 2021). [톱포토] 김세정, 올킬 미모. Top Daily (in Korean). Archived from the original on May 15, 2021. Retrieved April 27, 2021.
^Jang, Jin-ri (December 30, 2023). '모범택시2' 이제훈-'악귀' 김태리, 공동 대상 "우열 못 가려"[종합](SBS 연기대상) [Model Taxi 2's" Lee Ji-hoon and "Demon" Kim Tae-ri shared the Grand Prize for "Unequal" [Overall] (SBS Acting Awards)]. SpoTV News (in Korean). SpoTV. Archived from the original on December 30, 2023. Retrieved December 30, 2023 – via Naver.
^Kim, Ye-seol (December 29, 2023). '마이 데몬' 김유정♥송강, 베스트 커플상 수상...김유정 나홀로 수상 "팬분들께 감사해" [2023 SBS 연기대상] ['My Demon' Kim Yoo-jung♥Song Kang won Best Couple... Kim Yoo-jung won alone "Thank you to the fans" [2023 SBS Acting Awards] (SBS Acting Awards)]. OSEN (in Korean). Archived from the original on December 30, 2023. Retrieved December 30, 2023 – via Naver.
^Lee, Han-rim (August 20, 2021). 서울드라마어워즈 2021', 한류드라마상 온라인 투표 진행 [Seoul Drama Awards 2021, online voting for Hallyu Drama Awards]. TheFact (in Korean). Naver. Archived from the original on August 20, 2021. Retrieved August 20, 2021.
^"Excellent Actor Prize". Twitter (in Korean). August 20, 2021. Archived from the original on August 20, 2021. Retrieved August 20, 2021.
^Yeon, Hee-sun (October 21, 2021). 김선호, 사생활 논란 속 '스타트업' 인정...'서울드라마어워즈' 올해의 캐릭터 선정 [Kim Seon-ho recognized as 'startup' amid controversy over personal life... Selected as character of the year at 'Seoul Drama Awards']. OSEN (in Korean). Naver. Archived from the original on October 23, 2021. Retrieved October 21, 2021.
^Lee, Jae-hoon (September 16, 2021). [2021 뉴시스 한류엑스포]송강 "부모님·팬들 감사...앞으로 더 열심히 하겠다 [2021 Newsis Hallyu Expo: Song Kang "Thanks to my parents and fans... I will work harder in the future]. Newsis (in Korean). Naver. Archived from the original on September 16, 2021. Retrieved September 16, 2021.
^Kim, So-mi (July 17, 2020). [스페셜③] 10인의 스타와 기대주들 [Special: 10 Stars and Rising Stars]. Cine21 (in Korean). Archived from the original on September 22, 2024. Retrieved July 25, 2024.