Perfect Crown

Perfect Crown (Korean: 21세기 대군 부인) is an upcoming South Korean television series written by Yoo Ah-in, directed by Park Joon-hwa [ko], 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 in the first half of 2026, and will air every Friday and Saturday. It will also be available for streaming on Disney+.

Perfect Crown
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
Created by	Kang Dae-sun (MBC)
Written by	Yoo Ah-in
Directed by	Park Joon-hwa [ko]
Starring	IU Byeon Woo-seok Noh Sang-hyun Gong Seung-yeon
Music by	Kim Tae-seung[2]
Country of origin	South Korea
Original language	Korean
Production
Executive producer	Jang Se-jeong
Production companies	MBC Kakao Entertainment
Original release
Network	MBC TV

Synopsis

The series follows the story of a woman named Sung Hee-joo, who feels frustrated by her status as a commoner, even though she is a member of a conglomerate, and Prince Yi Ahn, who experiences sorrow as the king's son yet possesses nothing.

Cast and characters

Main

• IU as Sung Hee-joo^[3]

The second daughter of a chaebol family.

• Byeon Woo-seok as Prince Yi Ahn^[3]

The second son of a royal family.

• Noh Sang-hyun as Min Jeong-woo^[3]

The son from a prominent political family. He is Yi Ahn's friend.

• Gong Seung-yeon as Yoon Yi-rang^[3]

A woman who comes from a family that has produced four queens.

Supporting

• Yoo Su-bin
• Lee Yeon as Do Hye-jeong^[4]

Hee-joo's chief secretary.

• Chae Seo-an

Production

Development

The series is directed by Park Joon-hwa [ko], who previously directed Alchemy of Souls (2022–23),^[5] penned by Yoo Ah-in, while MBC and Kakao Entertainment co-managed the production. The series is the winning work of a 2022 MBC Drama Script Contest.^[3][6][7]

Casting

In December 2024, IU and Byeon Woo-seok were selected to star, as announced by Kakao Entertainment.^[8]

On March 28, 2025, TV Daily reported that IU and Byeon would be leaving the series, but their agencies denied the claim.^[9] On the next month, Noh Sang-hyun and Gong Seung-yeon were confirmed to appear following IU and Byeon.^[3] In June, Yoo Su-bin, Lee Yeon, and Chae Seo-an were reportedly cast.^[4][10][11]

Filming

Principal photography commenced in April 2025.^[12][13]

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.^[8][14][15]

In April 2025, the series was confirmed to be broadcast in the first half of 2026, and air in a MBC's Friday–Saturday timeslot.^[3] In November 2025, Disney+ unveiled that the series will also be available to stream on their platform.^[1]