* Translated by AI

IU and Byun Woo-seok's chemistry exploded, and so did their response.. No. 1 worldwide [Star Issue]

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Kim Mihwa

*This content was translated by AI.

[Seoul=NEWSIS] Reporter Jo Su-jeong = Actress IU (Lee Ji-eun) and Byun Woo-seok posed during the photo session at the production announcement for the MBC Friday-Saturday drama "21st Century Grand Duchess," held at Seoul Gangnam-gu Joseon Palace SeoulGangnam on the afternoon of the 6th. "21st Century Grand Duchess" will begin broadcasting on the 10th. 2026.04.06. chocrystal@newsis.com /Photo=Jo Su-jeong
[Seoul=NEWSIS] Reporter Jo Su-jeong = Actress IU (Lee Ji-eun) and Byun Woo-seok posed during the photo session at the production announcement for the MBC Friday-Saturday drama "21st Century Grand Duchess," held at Seoul Gangnam-gu Joseon Palace SeoulGangnam on the afternoon of the 6th. "21st Century Grand Duchess" will begin broadcasting on the 10th. 2026.04.06. chocrystal@newsis.com /Photo=Jo Su-jeong

IU and Byun Woo-seok delivered a hit. "21st Century Grand Duchess," which is globally streaming on Disney+, was recorded as the most-watched Korean series worldwide within five days of its release.

According to Disney+, "21st Century Grand Duchess" became the most-watched Korean series globally as of five days after its global premiere on Disney+. In particular, immediately following its initial release on the 10th, the series dominated top rankings on platforms that track various buzz and viewership metrics, while receiving widespread acclaim from global media outlets and viewers.

Foreign media outlets are also praising the work, calling it "a piece that truly satisfies the royal romance cravings of K-drama fans." In particular, the production's mise-en-scène, visuals, and fast-paced narrative are receiving high acclaim.

"21st Century Grand Duchess" is showcasing the charm of the K-series to the world through the solid acting chemistry of trusted actors and by skillfully incorporating Korean elements. In the third and fourth episodes, which are set to be released this week, the series will once again deliver a high level of immersion by depicting the deepening relationship between "Seong Hee-ju" (played by IU) and "Prince Lee An" (played by Byun Woo-seok") following the announcement of their contract marriage.

Meanwhile, "21st Century Grand Duchess" is a romantic story about fate and breaking class barriers, set in a 21st-century constitutional monarchy in the Republic of Korea. It follows Seong Hee-ju, a woman who has everything as a chaebol but is frustrated by her commoner status, and Prince Lee An, the king's son who is sad because he cannot possess anything.

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*This content was translated by AI.

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