2002–2005: Beginnings and rising popularity Jo Tae-gyu made his acting debut in
musical theatre in 2002, in the Korean stagings of popular musicals
The Rocky Horror Show and
Grease. From 2003 to 2004, using the
stage name Kang Ji-hwan, he began appearing in small roles on television, which included the
sitcom Nonstop 4 and the
Korean dramas
Summer Scent and
Save the Last Dance for Me.
2005–2008: First fame film roles and commercial peak Kang shot to fame in 2005 with
Be Strong, Geum-soon!, in his first onscreen leading role as a fastidious doctor who falls for a widowed hairdresser (played by
Han Hye-jin). The drama increased his
pan-Asian popularity, particularly in Japan, China, and Taiwan. He then made his big screen debut in the role of a
Jehovah's Witness who befriends an unemployed professor in the
independent film Host and Guest, which traveled the international film festival circuit. Kang continued acting on television but his 2006 dramas
Fireworks, about two cosmetics firm employees who plot revenge against their exes (opposite
Han Chae-young), and
90 Days, Time to Love, about a terminally ill married man who's in love with his cousin (opposite
Kim Ha-neul), received low viewership ratings. In 2007, he and
Han Ji-min starred in
Capital Scandal, a
period drama adapted from Lee Sun-mi's novel set in
Japanese-occupied Korea. His portrayal of a carefree playboy who transforms into an independence fighter garnered positive reviews. 2008 became a successful year for Kang. He was cast as the
titular Joseon folk hero in
Hong Gil-dong, written by the
Hong sisters. Kang said his portrayal was inspired by
Stephen Chow, and the fusion-period
dramedy became a TV
cult hit. Later that year, he also starred in
Rough Cut, a low-budget film directed by
Jang Hoon and written by
Kim Ki-duk about a gangster who wants to become an actor and a hot-tempered star who acts like a thug. Kang and costar
So Ji-sub were praised for their performances, and both won several Best New Actor awards.
2009–2012: Commercial success and comeback in film Kang then reunited with previous leading lady Kim Ha-neul in
My Girlfriend Is an Agent, a 2009
action-
romantic comedy in which their characters are former lovers and spies trying to conceal their professions from each other. It became the fourth highest grossing Korean film of that year, with more than 4 million tickets sold. Afterwards, he played a looks-oriented architect whose eye problem magically causes him to see the homely heroine (played by
Lee Ji-ah) as beautiful in
The Relation of Face, Mind and Love, a "telecinema" which received a brief theatrical release and a TV run. In 2010, Kang starred in romantic comedy series
Coffee House, in which he played an eccentric novelist who is caught in a love triangle with his publisher (played by
Park Si-yeon) and his assistant (played by
Ham Eun-jung). This was followed by his return to the stage in the musical revival
Cafe In, a love story between a male
sommelier and a female
barista. Kang produced the show's Korean and Japanese runs, and he also starred in the latter, becoming the first Korean actor to perform at the
Tokyo Globe Theatre. Kang and
Yoon Eun-hye then starred in 2011's
Lie to Me, playing a hotelier and a civil servant who fake being married to each other after she tells a white lie that quickly spreads through the gossip channels. The 2012 comedy film
Runway Cop reunited him with previous costar
Sung Yu-ri (from
Hong Gil-dong) and director Shin Tae-ra (from
My Girlfriend Is an Agent). During filming, Kang gained 12 kilograms and shed 15 kilograms two weeks later for his role as an overweight and messy detective who goes
undercover as a
fashion runway model to solve a case. Following that, he and
Lee Ki-woo appeared in a 25-minute "
music video drama" to promote
Kim Hyung-jun's
EP Escape.
2013–2015: Success roles In 2013, Kang starred in
Incarnation of Money, in the role of a prosecutor with ties to a
loan shark. Then in 2014's
Big Man, he played a "good-for-nothing" orphan who is tricked into thinking that he is the long-lost eldest son of a wealthy
tycoon's family, when they only want to harvest his heart for a
transplant. Kang and
Yoon Jin-seo shot the gangster love story
Heartbreak Hotel in
Los Angeles and
Las Vegas, and the indie was released in 2015. He was next cast in the Korean-Chinese romantic comedy
A-lister Fall from the Sky, about a scandal-ridden
Hallyu star who goes to China and encounters his biggest fan (played by Jiang Yuan).
2016–2017: Other films and later popularity Kang reunited with
Hong Gil-dong and
Runaway Cop co-star
Sung Yu-ri in revenge melodrama
Monster, which aired in 2016. In 2018, Kang starred in his first cable drama
Children of a Lesser God, playing a genius detective. The same year, he starred in the workplace comedy
Feel Good to Die.
2018–2020: Focus on roles and retirement In 2019, Kang starred in the series
Joseon Survival Period, but due to sexual assault allegations against him, he was replaced by
Seo Ji-seok from episode 11 onward. ==Contract disputes==