Detective K: Secret of the Virtuous Widow () is a 2011 South Korean film based on the novel by Kim Tak-hwan, starring Kim Myung-min in the lead role.
 It was the 4th best selling Korean film of 2011.
No Regret () is a 2006 South Korean film and the feature film directorial debut of Leesong Hee-il, based on his earlier short "Good Romance".
 "No Regret" is also regarded as "the first 'real' Korean gay feature", (although earlier South Korean films, such as "Road Movie", released in 2002, have dealt with gay relationships), and is also the first South Korean feature to be directed by an openly gay Korean filmmaker.
Jung Woo-sung (born April 22, 1973) is a South Korean actor, director, producer and model.
 He is also the first Korean UNHCR Goodwill Ambassador.
 Jung started his career as a fashion model, rising to stardom and teenage cult figure status with the gangster movie "Beat" (1997), for which he received the Best New Actor award at the 17th Korean Association of Film Critics Awards.
9th New York Korean Film Festival was held by the Korea Society showcasing a selection of the best of contemporary Korean cinema.
 The 2010 New York Korean Film Festival featured eight films in a collaborative effort with the Museum of Modern Art (MoMA) and the Brooklyn Academy of Music (BAM) Rose Cinema.
 Like previous festivals, the 2010 New York Korean Film Festival screened contemporary Korean films and also featured panel discussions with directors and other icons of Korean Cinema.
 The festival lasted from September 22, 2010 to October 3, 2010.
 Ranging from action to comedy, sci-fi to horror, to genre-bending altogether, this year's films represented not only Korea's top box-office hits but also some of the industry's most creative and substantial movies to date.
Park Hae-il (born January 26, 1977) is a South Korean actor.
 He began his acting career in theater, but soon gained the film industry's attention in 2003 with "Jealousy Is My Middle Name" and "Memories of Murder".
 Park's film career took off, with leading roles in films of diverse genres, including relationship drama "Rules of Dating" (2005), horror mystery "Paradise Murdered" (2007), and crime thriller "Moss" (2010).
 More recently, Park received Best Actor honors for his performance in the period action film "War of the Arrows", which was the highest-grossing Korean film of 2011.
 He also received critical acclaim for his role as an aging poet in "A Muse" (2012).
Jo Seung-woo (born March 28, 1980) is a South Korean actor.
 He is best known for his leading roles in the films "The Classic" (2003), "Marathon" (2005), "" (2006), and "Inside Men" (2015), as well as in the stage musicals "Jekyll & Hyde", "Hedwig and the Angry Inch" and "Man of La Mancha".
Song Jae-ho (born Song Jae-eon on March 10, 1937) is a South Korean actor.
 He made his acting debut in 1959, and became best known for his work in 1970s and 1980s Korean cinema, notably "Yeong-ja's Heydays" (1975).
 Song has since become one of the most respected veteran actors in Korean film and television, with more recent starring roles in the films "Memories of Murder" (2003), "The President's Last Bang" (2005) and "Late Blossom" (2011), as well as the television drama "Precious Family" (2004).
Ryu Seung-ryong (born November 29, 1970) is a South Korean actor.
 Ryu began his acting career in theater, subsequently becoming one of the most versatile supporting actors in Korean film and television.
 In 2013, he headlined "Miracle in Cell No. 7", which became (at the time) the third highest grossing Korean film of all time.
Jeong Jae-heon (Korean: 정재헌 ; born April 18, 1975) is a South Korean voice actor and actor.
 He joined Munhwa Broadcasting Corporation's voice acting division in 2002.
 After being a freelancer, Jae-heon made a brief appearance on a 2005 South Korean film "Quiz King", playing his role as a television news reporter.
 The voice actor became popular with his dub of Kiyomaro Takamine on "Zatch Bell!
", which has been one of his signature works.
 He gained popularity also by replacing Adam Rodriguez on "", and Archie Kao on "".
 In late 2011, Jae-heon once was on stage, portraying Lee Mong-ryong in a South Korean charity play "Hyang-dan, Fly".
 He has recently been known for his voicing Shota Kazehaya on the Korean dub of a Japanese television animation series "From Me to You", which made many fans of Jae-heon call him 정재하야 (Jeong-jae-ha-ya, a compound word formed from "Jeong Jae"-heon and Kaze"haya").
Marathon () is a 2005 South Korean film directed by Jeong Yoon-cheol, and starring Jo Seung-woo, Kim Mi-sook and Lee Ki-young.
 It received 5,148,022 admissions, making it the 4th most attended Korean film of 2005.

Question: Which movie did received the 2005 4th most attend Korean film of the year and starred a South Korean actor?
Answer: Marathon