The chemistry between a seasoned superstar and a rising talent is often the invisible engine that drives a romantic comedy, but for the cast of MBC’s upcoming series 21st Century Grand Princess (21세기 대군부인), that spark has already ignited off-screen. During a high-profile production press conference held at the Josun Palace Seoul Gangnam on April 6, IU revealed a surprising dynamic on set: while she plays the powerful lead, she found herself being “led” by her co-star and secretary, actress Lee Yeon.
The production, directed by Park Jun-hwa and written by Yoo Ji-won, marks a departure from traditional press events. While MBC typically hosts such gatherings at the Sangam Golden Mouse Hall, the decision to move the event to a luxury hotel underscores the ambitious scale and aesthetic of the drama. The series is set against the backdrop of a 21st-century constitutional monarchy, weaving a “status-breaking romance” between a woman who possesses everything except a royal title and a man who is the son of a king but possesses nothing.
A Mutual Admiration: From Award Ceremonies to On-Screen Partners
The relationship between IU (born 1993) and Lee Yeon (born 1995) is not merely a professional coincidence. IU disclosed that she had been a fan of Lee Yeon long before they were cast together, recalling a meeting at an awards ceremony where she expressed her desire to work with the younger actress. That seed of intention blossomed a year later into their current collaboration.
Lee Yeon, who portrays the highly capable secretary Jo Hye-jung, echoed this sentiment. Known for her intense roles in gritty series such as D.P., Juvenile Justice, and Weak Hero Class 1, Lee Yeon viewed this project as a pivotal opportunity for artistic growth. Stepping into the romantic comedy (rom-com) genre for the first time, she noted that the presence of a high-caliber cast made the decision to join the project an immediate one.
The bond between the two has extended beyond the filming schedule, with Lee Yeon sharing that they recently traveled together. This personal rapport translated into a seamless professional relationship. Lee Yeon remarked that IU’s natural aura made it easy to immerse herself in the role of a secretary, describing the singer-actress as looking like a “true CEO.”
The Power Dynamic of ’21st Century Grand Princess’
In the series, IU takes on the role of Sung Hee-joo, a chaebol heiress who possesses every luxury imaginable except for the royal status she craves. While the plot focuses on her romantic entanglements—including her relationship with the king’s son, played by Byeon Woo-seok—the internal team dynamics have provided an unexpected layer of comedy, and support.
IU’s admission that she was “led” by Lee Yeon on set highlights a reversal of their public standing. Despite IU’s seniority and global fame, she credited Lee Yeon for her meticulous preparation and the “engaging ideas” she brought to the table during filming. This collaborative spirit, IU noted, made the filming process incredibly comfortable and efficient, culminating in a confident assertion: “We are confident” in the result of their chemistry.
Production Overview and Cast
The ensemble cast brings together a mix of veteran presence and contemporary star power to execute the drama’s complex social commentary on class and destiny.
| Role/Category | Detail |
|---|---|
| Lead Actress | IU (as Sung Hee-joo) |
| Lead Actor | Byeon Woo-seok |
| Supporting Cast | Lee Yeon, Noh Sang-hyun, Gong Seung-yeon, Yoo Su-bin |
| Director | Park Jun-hwa |
| Writer | Yoo Ji-won |
| Network | MBC (Friday-Saturday Slot) |
What to Expect from the Premiere
The narrative promise of 21st Century Grand Princess lies in its subversion of the “royal romance” trope. By placing the story in a modern constitutional monarchy, the writers explore the friction between inherited privilege and personal ambition. The dynamic between the “all-powerful” Sung Hee-joo and her “all-capable” secretary Jo Hye-jung is expected to provide a grounded, humorous counterpoint to the high-stakes romance involving the royal family.
The production’s decision to cast Lee Yeon—an actress with a track record of intense, dramatic performances—in a rom-com suggests a desire to bring a different energy to the “secretary” archetype, moving away from mere subservience toward a partnership based on mutual professional respect and creative synergy.
21st Century Grand Princess is scheduled to premiere on April 10 at 9:40 PM KST. Viewers can expect a blend of opulent visuals and sharp social commentary, anchored by the chemistry of a cast that has spent the last year building a genuine friendship behind the scenes.
Do you think the “status-breaking” trope still works in modern K-dramas? Let us know your thoughts in the comments below and share this story with fellow fans of IU and Byeon Woo-seok.
