'Grand Duchess' IU♥Byun Woo-seok, Captures Ratings, Buzz, and Domestic and Global OTT

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'21st Century Grand Duchess' has firmly captured viewers both domestically and abroad.

MBC's Friday-Saturday drama '21st Century Grand Duchess' is sweeping ratings, buzz, and global OTT rankings by depicting the progressive journey of Seong Hee-ju (played by IU) and Prince Lee An (played by Byun Woo-seok) as they move toward a new future.

The 10th episode, aired on the 9th, recorded 13.5% in the Seoul metropolitan area, 13.3% nationwide, and 5.6% among viewers aged 20–54, marking a significant rise in both the Seoul metropolitan area and nationwide figures and setting a new series record for two consecutive days. Moreover, both episodes 9 and 10 ranked first in overall Friday and Saturday programming across the Seoul metropolitan area, nationwide, and among the 20th–54 demographic, firmly holding the top spot in ratings. (Nielsen Korea data)

FUNdex, a buzz index released by Good Data Corporation, also shows that '21st Century Grand Duchess' has maintained the number one position in TV-OTT drama buzz since its premiere, demonstrating the authority of a true powerhouse. The drama topped all buzz indicators—news, video, and VON—and in the category of TV-OTT drama actor/actress buzz, IU (as Seong Hee-ju) ranked second and Byun Woo-seok (as Prince Lee An) ranked first, securing a top-tier position for six consecutive weeks. (As of the 12th, 2026)

The '21st Century Grand Duchess' phenomenon is also sweeping global OTT platforms. According to FlixPatrol, a global OTT ranking site, '21st Century Grand Duchess' has climbed to third place globally and first among non-English titles in Disney+’s Top 10 TV Shows category, consistently holding a top position since its premiere. The drama ranked first in 15 countries, including Japan, Taiwan, Brazil, and Peru, showing particularly dominant strength in Latin America. It also secured second place in South Korea, Mexico, and Italy, and third place in Sweden and Canada, appearing in the top 10 in a total of 47 countries. Notably, on Disney+ in the United States, it has enjoyed a long-term run for 29 days, gaining steady popularity across regions including Latin America, North America, Europe, and Asia, underscoring the drama's widespread appeal. (As of the 11th, 2026)

With ratings, buzz, and OTT figures all rising relentlessly day after day, anticipation grows for what further records '21st Century Grand Duchess' will achieve as it races toward its finale. Following the first time in history that a drama topped the TV-OTT drama buzz index and secured the first and second spots in actor/actress buzz just two weeks before its premiere, and after achieving a complete sellout of advertising slots, all eyes are on the unstoppable momentum of '21st Century Grand Duchess'.

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*This content was translated by AI.