Question: This actress, starring alongside Cha Seung-won is considered to be the queen of what?

Context articles: Bodyguard (TV series)
My Son (film)
You're All Surrounded
Gong Hyo-jin
Cha Seung-won
Splendid Politics
The City Hall (TV series)
Man on High Heels
The Greatest Love
Jail Breakers

Bodyguard () is a 2003 South Korean television series starring Cha Seung-won, Lim Eun-kyung and Han Go-eun.
 It aired on KBS2 from July 5 to September 14, 2003 on Saturdays and Sundays at 19:50 for 22 episodes.
My Son () is a 2007 South Korean film written and directed by Jang Jin, starring Cha Seung-won and Ryu Deok-hwan.
 For his performance, Cha won Best Actor at the 15th Chunsa Film Art Awards in 2007.
You're All Surrounded () is a 2014 South Korean television series starring Lee Seung-gi, Cha Seung-won, Go Ara, Ahn Jae-hyun, Park Jung-min, Oh Yoon-ah, and Sung Ji-ru.
 It aired on SBS from May 7 to July 17, 2014 on Wednesdays and Thursdays at 21:55 for 20 episodes.
Gong Hyo-jin (born April 4, 1980) is a South Korean actress.
 She is best known for her leading role in the film "Crush and Blush" (2008), as well as for her popular television series "Sang-doo!
 Let's Go to School" (2003), "Thank You" (2007), "Pasta" (2010), "The Greatest Love" (2011), "Master's Sun" (2013), "It's Okay, That's Love" (2014), "The Producers" (2015), and "Jealousy Incarnate" (2016).
 She is considered to be the queen of romantic comedies due to her successful portrayals in her rom-com dramas.
Cha Seung-won (born 7 June 1970) is a South Korean actor who his career as an in-demand fashion model in the 1990s.
 Cha achieved stardom through the hit comedy films "Kick the Moon" (2001); "Jail Breakers" (2002); "My Teacher, Mr. Kim" (2003); and "Ghost House" (2004).
 After proving his versatility in other genres, notably in the period thriller "Blood Rain" (2005) and the melodrama "My Son" (2007), Cha's popularity continued with the television series "Bodyguard" (2003), "City Hall" (2009), and "The Greatest Love" (2011).
Splendid Politics () is a 2015 South Korean television series starring Cha Seung-won, Lee Yeon-hee, Kim Jaewon, Seo Kang-joon, Han Joo-wan and Jo Sung-ha.
 It aired on MBC from April 13 to September 29, 2015 on Mondays and Tuesdays at 22:00 for 50 episodes.
The City Hall (; lit.
 "City Hall") is a 2009 South Korean television series starring Kim Sun-a and Cha Seung-won.
 It aired on SBS from April 29 to July 2, 2009 on Wednesdays and Thursdays at 21:55 for 20 episodes.
Man on High Heels (; lit.
 "High Heel") is a 2014 South Korean noir film written and directed by Jang Jin, starring Cha Seung-won as a transgender homicide detective.
The Greatest Love (; also known as Best Love) is a 2011 South Korean romantic comedy television series about true love in the fake world of entertainment.
 Starring Cha Seung-won, Gong Hyo-jin, Yoon Kye-sang and Yoo In-na, it aired on MBC from May 4 to June 23, 2011 on Wednesdays and Thursdays at 21:55 for 16 episodes.
Jail Breakers () is a 2002 South Korean comedy film starring Sol Kyung-gu, Cha Seung-won and Song Yoon-ah.
 It was a box office hit with a total of 3,073,919 admissions nationwide, making it the 4th highest grossing Korean film of 2002.