Question: Jang Yeong-sil is a historical drama television series starring a South Korean actor best known for his role in what 2006 hit drama series? 

Context articles: Jang Hyun-sung
Im Ha-ryong
Ju Ji-hoon
Temptation of Wife (2012 TV series)
Song Il-gook
Im Won-hee
Du Yulu
Jang Yeong-sil (TV series)
Allen Leech
Happy Together (1999 TV series)

Jang Hyun-sung (born July 17, 1970) is a South Korean actor.
 He started his acting career as a member of the "Hakjeon" Theatre Company, before transitioning to film and television.
 Jang is best known for starring in director Song Il-gon's arthouse films such as "Spider Forest" (2004) and "The Magicians" (2006), and most notably "Feathers in the Wind" (2005), for which one review praised him for giving "the performance of his career."
 He also had major roles in "Nabi (The Butterfly)" (2001), "Rewind" (also known as "A Man Watching Video", 2003), "My Right to Ravage Myself" (2005), "Love Is a Crazy Thing" (2005), and "My Friend and His Wife" (2008).
 Aside from acting, Jang was one of the screenwriters for the Moon Seung-wook film "Romance" (2006).
Im Ha-ryong (born Im Han-yong on October 31, 1952) is a South Korean actor and comedian.
 During the 1980s and 1990s, Im was one of Korea's foremost comedians (called "gag men") alongside Shim Hyung-rae and Kim Hyung-gon.
 As his brand of comedy became less popular among younger viewers, Im started appearing in small supporting roles in films and television series, particularly those directed by Jang Jin.
 In 2005, he won Best Supporting Actor at the Blue Dragon Film Awards for his first major film role as a veteran soldier in the hit Korean War dramedy "Welcome to Dongmakgol".
 Other notable films include workplace/musical drama "Bravo My Life" (2007) and political satire "Good Morning President" (2009).
Ju Ji-hoon (; also romanized as Joo Ji-hoon; born May 16, 1982) is a South Korean actor.
 His first leading role was in the 2006 hit drama "Princess Hours".
 His other notable works include "The Devil", "Antique" and "Mask".
Temptation of Wife is a Philippine television drama series developed by Richard Cruz, which premiered on GMA Network it premiered on October 29, 2012 in GMA Telebabad block, replacing "Luna Blanca", and October 30, 2012 worldwide via GMA Pinoy TV.
 The series is a remake of 2008 South Korean hit drama series of the same title.
 It banners Marian Rivera, Dennis Trillo, Glaiza de Castro and Rafael Rosell as the four main characters of the series.
 It is under the helm of Dominic Zapata.
Song Il-gook (; born October 1, 1971) is a South Korean actor.
 He is best known for his role in the 2006 hit drama series "Jumong" as the titular character.
Im Won-hee (born Seoul, October 11, 1970) is a South Korean actor.
 Im was an alumnus of the legendary Daehak-ro theater troupe "Mokhwa" (), starring in many of Jang Jin's stage plays.
 He made his film debut in Jang's black comedy "The Happenings" in 1998, and through the years has become one of the most versatile supporting actors in Korean cinema, with notable roles in "Three... Extremes" and "Le Grand Chef".
 But Im is best known for his iconic role Dachimawa Lee, which began in 2000 as the title character of a 35-minute short film that director Ryoo Seung-wan made as a parody/homage to '70s Korean genre action films.
 The internet short was enormously popular and received more than a million page views, and in 2008, Ryoo again cast Im in an action-comedy feature film based on the same character, "Dachimawa Lee".
Du Yulu (born January 1, 1941) is a Chinese actor best known for portraying historical figures in several films and television series.
 Du graduated from the Harbin Arts Academy.
 During the Cultural Revolution, Du worked as a manual labourer at a grain storage.
 His first major work was in the film "Jianxi" (奸细), released in 1978.
 In 1997, he portrayed Zhang Tingyu in the popular prime time historical television series "Yongzheng Dynasty", vastly increasing his profile.
 In 2000, he acted as an elderly military officer in the television series "Escaping encirclement" (突出重围), and also portrayed the head of the household the hit television series "Da Zhai Men".
 In 2002, he appeared as a provincial party chief in "Provincial Party Secretary" (省委书记).
 In 2007, he portrayed Chiang Kai-shek in the series "Red Sun" (红日), and reprised this role in the historical drama "The East is Red" (东方红).
Jang Yeong-sil () is a 2016 South Korean historical drama television series starring Song Il-gook, Kim Yeong-cheol, Kim Sang-kyung and Park Sun-young.
 It replaced "" and aired on KBS1 from January 2, 2016 to March 26, 2016 on Saturdays and Sundays at 21:40 (KST) for 24 episodes.
Alan "Allen" Leech (born 18 May 1981) is an Irish actor best known for his role as Tom Branson on the historical drama series "Downton Abbey".
 He made his professional acting debut with a small part in a 1998 production of "A Streetcar Named Desire", made his first major film appearance as Vincent Cusack in "Cowboys & Angels", and earned an Irish Film & Television Awards nomination in 2004 with his performance as Mo Chara in "Man About Dog".
 Leech played Marcus Agrippa on the HBO historical drama series "Rome".
Happy Together () is a 1999 South Korean television series starring Lee Byung-hun, Song Seung-heon, Kim Ha-neul, Jo Min-su, and Jun Ji-hyun It aired on SBS from June 16 to August 5, 1999 on Wednesdays and Thursdays at 21:55 for 16 episodes.
 Starring young actors who would go on to become Korean TV and film stars, the hit drama revolves around five children who were separated at the death of their parents, and the love, conflicts, and reconciliation that these siblings go through when they meet again as adults.