# Mu Jin-sung (무진성)
**Mu Jin-sung** (무진성; born 1988) is a South Korean actor whose birth name is Yeo Ui-joo (여의주). He debuted in the 2013 MBC drama *[Two Weeks](https://www.edgepedia.org/two-weeks-tv-series)* and won Best New Actor at the 58th Daejong Film Awards for his film debut, *Perhaps Love* (2021).[1](https://www.imdb.com/name/nm6007051/) • [2](https://asianwiki.com/index.php?title=Mu_Jin-Sung)
| Key fact | Detail |
|---|---|
| Born | 1988, Incheon, South Korea[1](https://www.imdb.com/name/nm6007051/) • [3](https://dramalist.net/people/478/Mu-Jin-Sung) |
| Birth name | Yeo Ui-joo (여의주); adopted the stage name Mu Jin-sung when restarting his career after a hiatus[2](https://asianwiki.com/index.php?title=Mu_Jin-Sung) • [4](https://v.daum.net/v/20260918140007028) |
| Debut | *Two Weeks* (MBC, 2013), as Kim Min-soo[2](https://asianwiki.com/index.php?title=Mu_Jin-Sung) |
| Film debut | *Perhaps Love* (2021), as Yoo-jin, a writer with instinctive talent; won the role through a 200-to-1 audition[5](https://m.dailian.co.kr/news/view/1057256/D%EC%9D%B8%ED%84%B0%EB%B7%B0-%EB%AC%B4%EC%A7%84%EC%84%B1-%EC%9E%A5%EB%A5%B4-%EB%A1%9C%EB%A7%A8%EC%8A%A4-%EC%A4%80-%ED%99%95%EC%8B%A0-2021) |
| Major award | Best New Actor, 58th Daejong Film Awards (December 9, 2022), for *Perhaps Love*[2](https://asianwiki.com/index.php?title=Mu_Jin-Sung) |
| Notable series | *Misaeng: Incomplete Life* (2014), *Scholar Who Walks the Night* (2015), *The Tyrant* (2024), *Typhoon Family* (2025), *A Bona Fide Killer* (2026)[2](https://asianwiki.com/index.php?title=Mu_Jin-Sung) |
| Profile | 183 cm, blood type O; theater and film degree from Dongguk University[2](https://asianwiki.com/index.php?title=Mu_Jin-Sung) • [3](https://dramalist.net/people/478/Mu-Jin-Sung) |
## Name and early career
He worked under his birth name, Yeo Ui-joo, at the start of his career. After a break from acting, an acquaintance suggested he change his name for a fresh start, and he took the stage name Mu Jin-sung; he has said that changing the name changed his mindset as well, and that new work began to arrive afterward.[4](https://v.daum.net/v/20260918140007028) He graduated from [Dongguk University](https://www.edgepedia.org/dongguk-university) with a degree in theater and film.[3](https://dramalist.net/people/478/Mu-Jin-Sung)
His debut came in the 2013 MBC drama *Two Weeks*, followed the same year by roles in SBS's *Passionate Love* (as the young Hong Soo-hyuk) and MBC's *The King's Daughter, Soo Baek-hyang*.[2](https://asianwiki.com/index.php?title=Mu_Jin-Sung) Through the mid-2010s he accumulated supporting parts in widely watched series, including Jang Ki-seok in *Misaeng: Incomplete Life* (tvN, 2014) and No Hak-young in *Scholar Who Walks the Night* (MBC, 2015).[2](https://asianwiki.com/index.php?title=Mu_Jin-Sung)
## Breakthrough with Perhaps Love
**Screen debut.** *Perhaps Love* (*Jangreuman Romance*, 2021) was his first film. He passed a 200-to-1 audition to play Yoo-jin, a writer with instinctive, genius-level talent whose feelings for the bestselling author Hyun (Ryoo Seung-ryong) drive the romantic comedy's tangle of relationships.[5](https://m.dailian.co.kr/news/view/1057256/D%EC%9D%B8%ED%84%B0%EB%B7%B0-%EB%AC%B4%EC%A7%84%EC%84%B1-%EC%9E%A5%EB%A5%B4-%EB%A1%9C%EB%A7%A8%EC%8A%A4-%EC%A4%80-%ED%99%95%EC%8B%A0-2021) • [6](https://www.xportsnews.com/article/1502904) He has described the audition as arriving while he was in a slump as an actor, like a gift, and the film as the work that first earned him recognition as an actor.[5](https://m.dailian.co.kr/news/view/1057256/D%EC%9D%B8%ED%84%B0%EB%B7%B0-%EB%AC%B4%EC%A7%84%EC%84%B1-%EC%9E%A5%EB%A5%B4-%EB%A1%9C%EB%A7%A8%EC%8A%A4-%EC%A4%80-%ED%99%95%EC%8B%A0-2021) • [4](https://v.daum.net/v/20260918140007028)
The role brought him the Best New Actor award at the 58th Daejong Film Awards, held in Seoul on December 9, 2022.[2](https://asianwiki.com/index.php?title=Mu_Jin-Sung) At that ceremony, *Perhaps Love* was among the films winning two awards each, alongside *Hansan: Rising Dragon* and *The Girl on a Bulldozer*.[7](https://www.koreanfilm.or.kr/eng/films/index/peopleView.jsp?peopleCd=20325132)
## Television work and recent prominence
After supporting turns in *Birthcare Center* (tvN, 2020) and *Strangers Again* (ENA-Genie TV, 2023), his visibility rose with a run of contrasting roles: Yeon Mo-yong in the Disney+ series *The Tyrant* (2024), Pyo Hyun-jun in tvN's *Typhoon Family* (2025), and, in 2026, Ki Young-do in MBC's *[A Bona Fide Killer](https://www.edgepedia.org/a-bona-fide-killer)* and Son Soo-hyun in the Netflix series *[Mousetrap](https://www.edgepedia.org/mousetrap-tv-series)*.[2](https://asianwiki.com/index.php?title=Mu_Jin-Sung) • [1](https://www.imdb.com/name/nm6007051/)
**A Bona Fide Killer.** In the MBC Friday-Saturday drama he played Ki Young-do, an assistant manager at Dumumi Electronics' sales team 3 and a genius hacker who assists the working mother Yu Bo-na (Kong Hyo-jin) with cool judgment and formidable hacking skill while showing clumsiness in everyday life and romance.[8](https://www.mk.co.kr/news/hot-issues/12156436) Director Yoon Jong-ho offered him the role directly, judging that his unsmiling, cold-seeming image matched the original webtoon's "cold handsome man" character.[8](https://www.mk.co.kr/news/hot-issues/12156436) Because it was his first adaptation, he read the source work beforehand, something he said he rarely does when preparing roles.[8](https://www.mk.co.kr/news/hot-issues/12156436)
The series ended on September 12 with its highest single-episode rating, 10.7%, the third-highest figure among MBC dramas broadcast that year, behind *21st Century Grand Prince's Wife* and *Judge Lee Han-young*.[8](https://www.mk.co.kr/news/hot-issues/12156436) Viewers who watched both *A Bona Fide Killer* and *Mousetrap* around the same time reacted to learning that the two very different characters were played by the same actor, a response he called the highest praise for an actor, while acknowledging that some viewers remember the characters without knowing his name.[4](https://v.daum.net/v/20260918140007028)
## Acting approach
He has described his preferred acting as un-formulaic, giving the sense of someone not seen before. For Ki Young-do he focused less on the stock "genius hacker" trope than on the character's gaps: a perfectionist whose composure breaks in romance, as if a wrong input value produced an output error.[8](https://www.mk.co.kr/news/hot-issues/12156436) In *Mousetrap* he deliberately played Son Soo-hyun as an ordinary, joking person at first, so that the character's later, different face would land with greater dissonance.[4](https://v.daum.net/v/20260918140007028)
## References
1. [Mu Jin-sung, IMDb](https://www.imdb.com/name/nm6007051/)
2. [Mu Jin-Sung, AsianWiki](https://asianwiki.com/index.php?title=Mu_Jin-Sung)
3. [Mu Jin-Sung, DramaList](https://dramalist.net/people/478/Mu-Jin-Sung)
4. [Interview: Mu Jin-sung, "'Is that the same actor?' is the best praise" (Star Today via Daum, September 18, 2026)](https://v.daum.net/v/20260918140007028)
5. [D: Interview: Mu Jin-sung, the certainty *Perhaps Love* gave him (Dailyian, November 27, 2021)](https://m.dailian.co.kr/news/view/1057256/D%EC%9D%B8%ED%84%B0%EB%B7%B0-%EB%AC%B4%EC%A7%84%EC%84%B1-%EC%9E%A5%EB%A5%B4-%EB%A1%9C%EB%A7%A8%EC%8A%A4-%EC%A4%80-%ED%99%95%EC%8B%A0-2021)
6. ['Perhaps Love' Mu Jin-sung interview (Xports News, 2021)](https://www.xportsnews.com/article/1502904)
7. [MU Jin-sung, KOFIC Korean Film Council database](https://www.koreanfilm.or.kr/eng/films/index/peopleView.jsp?peopleCd=20325132)
8. [Interview: Mu Jin-sung, "'A Bona Fide Killer' 10.7% happiness... burden of the original 'cold handsome man'" (Star Today, September 18, 2026)](https://www.mk.co.kr/news/hot-issues/12156436)
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*Topic: Encyclopedia › Arts and culture › Screen and stage › Film and television › Screen people and creators › Screen actors of East and Southeast Asia › South Korean actors, 2000s onward › Surnames M to S*
*Initially written Sep 17, 2026 · Reviewed: Sep 18, 2026; Oct 25, 2026 · Edited: Sep 18, 2026; Oct 12, 2026; Oct 25, 2026 · Last review: Oct 25, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license