Remembering Lee Young Joo: 5 Things to Know About the Late ‘Princess Hours’ and ‘Blue Tower’ Actor

The K-drama community is mourning the heartbreaking loss of actor Lee Young Joo, who passed away suddenly on August 29, 2026, at the age of 44. Announced by close friends and confirmed by South Korean media, the former model and comedy star died from sudden cardiac arrest, leaving behind a legacy of unforgettable roles and a resilient, warm spirit off-camera.

From his early days on fashion runways to capturing hearts in 2000s Hallyu classics, Lee Young Joo was a multi-talented performer who brought immense joy to television screens. At D-Muse Magz, we are celebrating his life, his career milestones, and the courage with which he navigated both health struggles and personal reinvention.

1. From Runway Model to ‘Princess Hours’ Fan Favorite

Born in 1982, Lee Young Joo initially pursued his love for movement by studying Sports at Kyungwon University. With his impressive height and striking features, he easily transitioned into fashion modeling before catching the acting bug in the early 2000s.

He made his official acting debut in the 2004 historical film Doma Ahn Jung-geun and quickly gained traction in the television world through the MBC sitcom Hello, Franceska. However, for international audiences—particularly across Southeast Asia where Hallyu television was exploding—Lee Young Joo became a household face through the hit 2006 MBC romantic drama Princess Hours (also known as Goong).

In Princess Hours, Lee Young Joo played Jang Kyung, one of the loyal high school confidants of Crown Prince Lee Shin (played by Ju Ji Hoon). Sitting alongside co-stars Yoon Eun Hye and Song Ji Hyo, his charm and easygoing screen presence added warmth to one of the most iconic Korean dramas of the 21st century.

2. The ‘Blue Tower’ Breakthrough and the Irony of His Military Role

While Princess Hours introduced Lee Young Joo to global audiences, his definitive career breakthrough arrived in 2013 with tvN’s hit military comedy series Blue Tower.

Playing Private Lee Yong-joo, a clumsy, hapless new recruit constantly stumbling into absurd misadventures, his comedic timing earned widespread critical acclaim. The role showcased his incredible ability to embrace physical comedy and quickly became one of his most celebrated performances.

[2004 Film Debut] ───> [2006 'Princess Hours'] ───> [2013 'Blue Tower' Breakout] ───> [2022 Business Transition]

What many viewers did not know at the time was the poignant irony behind his performance: while Lee Young Joo convincingly played a struggling army recruit on screen, he had actually been exempted from mandatory military service in real life due to a severe, underlying heart condition.

3. Speaking Openly About Hypertrophic Cardiomyopathy

In February 2026, Lee Young Joo made a memorable appearance on fellow actor Lee Jong Hyuk’s popular YouTube channel. During the candid interview, he spoke openly about his health journey, explaining the medical reality that had kept him from serving in the military.

Lee Young Joo had been diagnosed with hypertrophic cardiomyopathy—a chronic condition where the heart muscle becomes abnormally thick, making it harder for the heart to pump blood effectively.

He shared that the disease ran in his family, explaining that he was diagnosed after undergoing a medical screening following his mother’s hospitalization for the exact same condition. By speaking so openly about his diagnosis, Lee Young Joo brought important awareness to genetic heart conditions while maintaining a positive, lighthearted outlook on life.

4. Stepping Away from Acting to Build a New Life

In 2022, Lee Young Joo made the quiet decision to retire from the entertainment industry and explore new opportunities as an entrepreneur. Transitioning away from public life was not without its hurdles, but his resilience defined his later years:

• Starting Fresh in Busan: He initially launched a private business venture in the coastal city of Busan, though he later shared that the business faced financial setbacks.
• The Travel Agency in Seongnam: Undeterred by failure, he returned to the Seoul metropolitan area and built a one-person travel agency located near Moran Market in Seongnam.
• A Warm Reunion: His 2026 YouTube appearance alongside industry friends served as his final public interview, showing a man grounded, hardworking, and excited about his new path in life.

5. Career & Life Profile: Lee Young Joo at a Glance

Profile Attribute	Key Details & Milestones
Full Name	Lee Young Joo (also written as Lee Yong Joo)
Lifespan	1982 – August 29, 2026 (Passed away at age 44)
Education	Sports Major, Kyungwon University
Acting Debut	Doma Ahn Jung-geun (2004)
Breakout Television Roles	Jang Kyung in Princess Hours (2006) & Private Lee in Blue Tower (2013)
Notable Drama Credits	Ugly Young-Ae, The Women’s Room, 12 Years Promise, Golden Pouch, Less than Evil
Medical Condition	Hypertrophic Cardiomyopathy (Heart Muscle Disease)
Post-Acting Profession	Entrepreneur & Independent Travel Agency Owner

A Lasting Legacy of Light and Kindness

Following the news of his sudden passing, former co-stars, directors, and fans flooded social media with tributes, remembering Lee Young Joo as much for his gentle demeanor off-camera as for his memorable comedic timing on screen. Whether he was entertaining millions on a hit sitcom or running his local travel agency in Seongnam, Lee Young Joo approached life with authenticity and courage.

Though he left us far too soon at age 44, his work in foundational Hallyu classics like Princess Hours and Blue Tower will continue to bring smiles to K-drama lovers for generations to come.

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