Kim began his career as a fashion model at the 2007Seoul Fashion Week and for jeans brandEvisu in 2008. He made his acting debut in thequeercoming-of-age filmJust Friends? in 2009 under the stage name Seo Ji-hoo. His management agency later changed his stage name to Yeon Woo-jin.[2]
After playing a teacher in 2010 daily dramaAll My Love,[3] he started to gain recognition as the youngest brother in hit 2011 family dramaOjakgyo Family.[4] Then in his first lead role, Yeon's character falls in love with the daughter of his brother's murderer in the 4-episodeDrama SpecialJust an Ordinary Love Story.[5][6][7]
In 2012, he was cast as a mysterious villain in the period fantasy-romanceArang and the Magistrate.[8][9][10] Yeon reunited withArang director Kim Sang-ho in 2013, to again play the protagonist's rival in the gangster melodramaWhen a Man Falls in Love.[11]
This was followed by leading roles in two romantic comedy series: as a commitment-phobic plastic surgeon inMarriage, Not Dating (2014) and as a vengeful office manager-turned-attorney inDivorce Lawyer in Love (2015).[12][13][14]
In 2022, Yeon appeared in romantic drama film,Serve the People written and directed byJang Cheol-soo opposite Ji An. The film based on theeponymous novel byYan Lianke, drew wide attention and Yeon was praised for his performance as a model soldier.[21] Later in March 2022, Yeon confirmed that on the 10th of Yeon Woo-jin's official Japanese website, an announcement was posted under the heading 'About the schedule of the 2022 visit to Japan event'. He held fan meetings in Tokyo on August 11 and Osaka on August 13.[22]
^Chun Joo-young (March 11, 2022)."연우진, 8월 일본 팬미팅 개최 결정" [Woojin Yeon, decided to hold a fan meeting in Japan in August] (in Korean). My Daily.Archived from the original on March 11, 2022. RetrievedMarch 11, 2022 – viaNaver.
^Jeon Hyung-hwa (November 30, 2021)."박소담 원톱 액션영화 '특송' 2022년 1월 5일 개봉 확정" [Park So-dam's one-top action movie 'Special Song' to be released on January 5, 2022] (in Korean). Star News.Archived from the original on November 30, 2021. RetrievedNovember 30, 2021 – viaNaver.
^Jo Ji-young (January 19, 2022)."[공식] 연우진X지안 파격 멜로 '인민을 위해 복무하라', 2월 개봉 확정" [[Official] Yeon Woo-jin X Ji-an's extraordinary melodrama 'Serve the People', confirmed for release in February] (in Korean).Sports Chosun.Archived from the original on March 20, 2022. RetrievedJanuary 19, 2022 – viaNaver.
^Moon Ji-yeon (July 30, 2020)."[공식] 연우진X한선화→유선호, '언더커버' 라인업 완성" [[Official] Woojin Yeon X Sunhwa Han → Seonho Yoo, 'Undercover' lineup complete] (in Korean).Sports Chosun.Archived from the original on October 19, 2022. RetrievedAugust 27, 2022 – viaNaver.
^Jung Han-buyl (August 6, 2021)."연우진·이무생·이태환, '서른, 아홉' 합류...손예진 만난다" [Yeon Woo-jin, Lee Mu-saeng, and Lee Tae-hwan join 'Thirty, Nine'... Meet Son Ye-jin].Hankook Ilbo (in Korean).Naver.Archived from the original on December 5, 2021. RetrievedAugust 6, 2021.
^Ahn So-yun (July 21, 2022)."[공식] 박보영·연우진·장동윤·이정은, '정신병동에도 아침이 와요' 출연 확정" [[Official] Park Bo-young, Yeon Woo-jin, Jang Dong-yoon, and Lee Jung-eun confirmed to appear in 'Morning Comes to the Mental Hospital'] (in Korean).Sports Chosun.Archived from the original on April 19, 2023. RetrievedJuly 21, 2022 – viaNaver.
^Lee, Kyung-ho (July 25, 2023)."[단독]김하늘X연우진X장승조, '멱살 한번 잡힙시다'로 뭉쳤다..주연 발탁 [종합]" [[Exclusive] Kim Ha-Neul, Yeon Woo-Jin, and Jang Seung-Jo team up for 'Let's Catch a Smackdown'..they're set to star in the film [Total]] (in Korean). MT Star News.Archived from the original on January 5, 2024. RetrievedAugust 1, 2023 – viaNaver.
^Lee Mi-ji (October 11, 2021)."강릉 출신' 연우진, 제3회 강릉국제영화제 개막식 오프닝 호스트 확정(공식)" ['From Gangneung' Yeon Woo-jin confirmed as the opening host for the opening ceremony of the 3rd Gangneung International Film Festival (official)] (in Korean).Herald POP.Archived from the original on October 11, 2021. RetrievedOctober 11, 2021 – viaNaver.