IU and Byeon Woo-seok’s New Drama Hits 11% in Just 4 Episodes

MBC's new Friday-Saturday drama "21st Century Grand Prince's Wife", starring IU and Byeon Woo-seok, is leading both the ratings race and online conversation. The series climbed past 11% in only four episodes, a rapid rise that has put it at the center of the Korean TV industry.

The drama opened on Oct. 10 with a 7.8% rating for its first episode, marking the third-highest premiere ever for an MBC Friday-Saturday drama. Episode 2 quickly jumped to 9.5%. While Episode 3 dipped slightly to 9.0% on Oct. 17, the Saturday broadcast on Oct. 18 pulled in 11.1%, crossing into double digits faster than most recent MBC titles in this slot.

This trajectory puts "21st Century Grand Prince's Wife" at No. 7 on the all-time ratings list for MBC Friday-Saturday dramas. It now sits just 0.3 percentage points behind Wonderful World (2024), which peaked at 11.4%.

The buzz numbers are equally strong. According to industry tracking, the show became the first title ever to reach No. 1 in the combined TV and OTT drama category before its premiere. Ad inventory sold out entirely ahead of the launch. TIME magazine also named it one of the most anticipated Korean dramas of 2026, signaling international interest before the first episode even aired.

Early reactions to Byeon Woo-seok's performance have been mixed. Some viewers feel his stylized delivery fits the heightened tone of a romantic comedy, while others have called it a little stiff. What remains undisputed, however, is his visual impact. A shower scene in the opening episode drew an immediate response online, and most fans agree his look fits the grand prince role perfectly.

The Episode 3 ending, a kiss between IU and Byeon Woo-seok against a stone wall, became the next major talking point. Although some viewers thought the moment arrived too early in the story, it still commanded massive attention. Industry insiders say that was always the strategy. "From the start, this drama was built around the stars and their visuals," an industry source commented. "Casting was driven by character image and buzz rather than raw acting credentials."

The project drew heavy interest from the moment the casting was announced last year. While reactions to the actual broadcast have varied, the overall response has leaned positive. Ratings and buzz are climbing together, which in the Korean market is usually the clearest sign of a hit.

This success matters especially for Byeon Woo-seok. His previous lead role, tvN's Lovely Runner, became a major cultural moment but peaked in the 5% range in ratings. "21st Century Grand Prince's Wife" is already pulling in more than double those numbers while keeping a similar level of online conversation. Many in the TV industry expect it to become his new career-defining title.

IU is central to this result. Her sharp comedic timing and feel for an offbeat character are lifting the show's overall quality, and her pairing with Byeon Woo-seok is delivering on the expectations fans held when casting was first reported.

"21st Century Grand Prince's Wife" is proving itself on three fronts at once: star power, online buzz, and a fast-rising ratings line. Despite some uneven early reviews, the show is settling into a clear hit pattern. The question now is how high those numbers can still go.