Teach You a Lesson Star Kim Mu-yeol accidentally declared his love while drunk: 11 facts about the actor

Based on the popular webtoon Get Schooled, the latest K-drama to capture global attention, Teach You a Lesson on Netflix, follows four members of the fictional Educational Rights Protection Bureau. Led by Na Hwa-jin (played by Kim Mu-yeol), the team takes on school delinquents and exposes administrative corruption. If you’re wondering who Kim Mu-yeol is, here are 10 things to know about the actor behind the tough-talking enforcer.

He is a Gemini

Born on May 22, 1982, the 44-year-old actor is a Seoul native and falls under the Gemini zodiac sign.

He is tall

Besides his chiselled physique, Kim Mu-yeol stands at an impressive 183cm.

He studied performing arts

His passion for acting began early and led him to pursue the craft throughout high school and university. He studied at Sungkyunkwan University, whose notable alumni include Song Joong-ki, Moon Geun-young, Cha Eun-woo and Krystal Jung.

He had a difficult start in life

Before finding success as an actor, Kim Mu-yeol worked various odd jobs to help pay for his father’s medical expenses after he was diagnosed with cancer. Following a cerebral haemorrhage that left his father in a vegetative state, Mu-yeol became the family’s sole breadwinner.

He is a devoted dog lover

Together with his wife, actress Yoon Seung-ah, Kim has cared for several rescue dogs over the years. The couple are vocal advocates for pet adoption and frequently share glimpses of their furry family.

He is a father

After tying the knot in April 2015, Kim Mu-yeol and Yoon Seung-ah welcomed their first child, a son, in 2023.

He has earned John Cena’s seal of approval

In 2024, WWE superstar-turned-actor John Cena posted a photo of Kim Mu-yeol on social media without any caption or explanation. Fans quickly interpreted the post as Cena acknowledging their uncanny resemblance — and the internet wholeheartedly agreed.

Fitness is a huge part of his life

Like Rome wasn’t built in a day, Kim Mu-yeol’s impressive physique is the result of years of discipline and functional training. His love for fitness can be traced back to his youth, when he competed in track and field events in middle school. Representing his school in city and provincial competitions, he specialised in the 100m, 200m and high jump.

His real-life love story sounds like a rom-com

Kim Mu-yeol met his wife through a mutual friend, and the pair had their first date at a coffee shop. Their relationship became public in an unusual way when the actor accidentally posted a poetic love confession on social media while intoxicated — a message that had actually been intended to remain private. The happy accident paid off: the couple confirmed their relationship in 2012 and married three years later.

He is still close to his high school best friend

Kim Mu-yeol and singer Rain (Jung Ji-hoon) have been friends since their days at Anyang Arts High School. Over the years, they have remained close travel companions and even reunited onscreen for the reality show Crazy Tour.

His breakthrough came nearly two decades ago

Although he began his career in theatre, Kim Mu-yeol’s first major breakthrough came in 2005 through the Korean productions of Assassins and Grease. He later transitioned to television and film, carving out a niche in action and thriller projects. Viewers may recognise him from Sweet Home, Juvenile Justice and Queen Woo.