Perfect Crown
Upcoming South Korean television series
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Perfect Crown (Korean: 21세기 대군 부인) is an upcoming South Korean romantic comedy television series written by Yoo Ji-won, and directed by Park Joon-hwa and Bae Hee-young, and starring IU, Byeon Woo-seok, Noh Sang-hyun, and Gong Seung-yeon. The series unfolds when the second daughter of a chaebol family enter a contract marriage with the second son of the king. It is scheduled to premiere on MBC TV on April 10, 2026, and will air every Friday and Saturday at 21:40 (KST). It will also be available for streaming on Disney+.
| Perfect Crown | |
|---|---|
Teaser poster | |
| Also known as | Wife of a 21st Century Grand Prince[1] |
| Hangul | 21세기 대군 부인 |
| Lit. | The 21st Century Grand Prince's Wife |
| RR | 21segi daegun buin |
| MR | 21segi taegun puin |
| Genre | Romantic comedy |
| Written by | Yoo Ji-won |
| Directed by |
|
| Starring | |
| Music by | Kim Tae-seung[2] |
| Country of origin | South Korea |
| Original language | Korean |
| Production | |
| Executive producers | |
| Producers | |
| Running time | 80 minutes |
| Production companies | |
| Original release | |
| Network | MBC TV |
Synopsis
The series follows the story of a woman named Sung Hui-ju, who feels frustrated by her status as a commoner, even though she is a member of a conglomerate, and Prince I-an, who experiences sorrow as the king's son yet possesses nothing.
Cast and characters
Main
- The second daughter of Castle Group, she navigates a world where her wealth is offset by the stigma of her illegitimate birth. Despite the frequent scorn from her peers, she maintains a composed and assertive demeanor. Driven by a goal to secure her social standing through marriage, she approaches Prince I-an with a formal proposal.
- Byeon Woo-seok as Prince I-an[4]
- The second son of a royal family, whose existence poses an inherent political threat to the King. Under constant surveillance by Queen Dowager Yoon Yi-rang, he faces increasing pressure to enter a strategic marriage that would further limit his autonomy.
- Noh Sang-hyun as Min Jeong-woo[4]
- Born into a prominent political family, he serves as Prince I-an's confidant. His background provides him with the connections and influence to navigate the palace's inner circles alongside the Prince.
- Gong Seung-yeon as Queen Dowager Yoon Yi-rang[4]
- A member of a politically dominant lineage that has produced four queens, she is driven by the need to secure her young son's future. Her position makes her wary of I-an's influence, leading her to aggressively advocate for his marriage to neutralize him as a potential rival.
Supporting
Residence of Grand Prince I-an
- Yoo Su-bin as Choi Hyun[5]
- A loyal aide dedicated to Prince I-an. While he follows strict palace protocol in public, he and the Prince share a casual, close relationship outside the palace walls.
- Choi Ji-soo as Lee Ah-reum
- Lee Si-hoon as Kim Young-moon
- Jung Ji-an as Kim Young-sun
- Jin Se-rim as Yoo Ji-soo
Secretariat of Castle Beauty
- Hui-ju's chief secretary. While she is the person Hui-ju relies on most, they frequently clash on various issues.
- Park Ji-ye as Park Seung-hee
- Jung Yi-an as Im Joo-ho
- Yoon Sul-ah as Jung Ye-rin
People of Castle Group
- Jo Seung-yun as Sung Young-gook
- Lee Jae-won as Sung Tae-joo[7]
- The eldest son of Castle Group and Hui-ju's older brother.
- Chae Seo-an as Han Da-young
People of the Royal Palace
- TBA as I-hwan
- Kim Eun-oh as I-yun
- Park Joon-myun as Choi Jin-sook
- Lee Chae-kyung as Im Sun-hwa
- Kim Soo-jin as Jung Mi-hee
Others
- Jo Jae-yoon as Yoon Sung-won
- Kim Jung-woon as Jo Min-young
Production
Development
MBC and Kakao Entertainment announced the production of Perfect Crown, a contemporary romance series set within an alternative-reality South Korean constitutional monarchy. Developed from an award-winning script written by Yoo Ah-in from the 2022 MBC Drama Screenplay Contest,[8] the project was planned by Kang Dae-seon.[9] Directed by Park Joon-hwa, who helmed Alchemy of Souls (2022–23), and Bae Hee-young while Yoo Ji-won served as screenwriter.[10][7]
Casting
In December 2024, Kakao Entertainment confirmed that IU and Byeon Woo-seok would star in the series.[11] Three months after the confirmation, TV Daily reported that IU and Byeon would be leaving due to scheduling conflicts but it was denied by their agencies.[12] In April 2025, Noh Sang-hyun and Gong Seung-yeon were cast following IU and Byeon.[4] In June 2025, Yoo Su-bin, Lee Yeon, and Chae Seo-an also join the cast.[6][13][14]
Filming
Principal photography commenced in May 2025.[15]
Release
Perfect Crown was originally slated to premiere on MBC TV in the second half of 2025, but then it was decided to air it either at the end of the year or in 2026.[16][17][18] The series was reported for an April 3, 2026 broadcast.[7] In November 2025, Disney+ unveiled that the series will also be available to stream on their platform.[1] In March 2026, the premiere date was confirmed to be on April 10, and will air in MBC's Friday–Saturday timeslot at 21:40 (KST).[19]
