IU X Byun Woo-seok '21st Century Grand Duchess' Group Poster Released… "The Royal Door Opens"

The highly anticipated work 〈21st Century Grand Duchess〉 that the world has been waiting for in the first half of 2026 has unveiled its veil. Set against the unique backdrop of a constitutional monarchy in 21st century South Korea, a group poster capturing the intense aura of four characters at the center of the royal family has been dramatically released.

Queen of the Business World IU X National Grand Duke Byun Woo-seok… "A Historic Marriage Declaration That Will Shake the Royal Family"

The released group poster captures the four protagonists against the majestic palace with the tagline, "The Royal Door Opens." The focus is drawn to the poised figure of Seong Hee-joo (played by IU), the representative of 'Castle Beauty' and the most talked-about figure in the business world, alongside the stunningly handsome Lee An Grand Duke (played by Byun Woo-seok), who is loved by the entire nation.

Having everything but always dissatisfied with her commoner status, Hee-joo, and the grand duke, who is the king's son but has no real power to possess anything, are two people whose backgrounds and goals are polar opposites. Their unexpected 'surprise marriage declaration' raises curiosity about what kind of aftershocks it will create in the royal family and political circles of South Korea.

No Sang-hyun X Gong Seung-yeon Join… Intertwined Four Characters with Four Colors of Relationships

The weight of the characters surrounding Hee-joo and Lee An Grand Duke is also significant. The perfectionist Prime Minister Min Jeong-woo (played by No Sang-hyun), who leads the political scene in South Korea, is a close friend of Lee An Grand Duke and cares for Hee-joo, who is his junior. However, after the announcement of their contract marriage, he shows signs of great agitation, stimulating curiosity about his hidden emotional line.

Additionally, Yoon I-rang (played by Gong Seung-yeon), who has placed her young son on the throne and has become the queen, is wary of Lee An Grand Duke, who threatens her position, adding tension to the drama. How Lee An Grand Duke's unexpected marriage will shake the royal landscape that Yoon I-rang has designed is a key point to watch in this work.

Global Release on Disney+ on April 10… A Destiny-Pioneering Story That Breaks Class Barriers

〈21st Century Grand Duchess〉 aims to captivate global viewers by combining stunning visuals, intense palace intrigue, and a romance that transcends class. The 21st-century royal narrative, completed by South Korea's top actors, will be simultaneously released worldwide on Disney+ on April 10 (Friday).