The First Night with the Duke

Director

• 
  Lee Woong Hee

Main Role

• 
  Seo Hyun

  Cha Seon Chaek / "K"

  Main Role
• 
  Ok Taec Yeon

  Yi Beon / Prince Gyeong Seong

  Main Role
• 
  Kwon Han Sol

  Cho Eun Ae

  Main Role
• 
  Seo Bum June

  Jung Su Gyeom

  Main Role
• 
  Ji Hye Won

  Do Hwa Seon

  Main Role

Support Role

• 
  Oh Se Eun

  Bong Ul I [Servant]

  Support Role
• 
  Joo Seok Tae

  King Sul Jong

  Support Role
• 
  Yoon Jung Hoon

  Cha Se Ho [Seon Chaek's brother]

  Support Role
• 
  Nam Gi Ae

  Dae Bi [King's mother]

  Support Role
• 
  Lee Tae Sun

  Prince Yi Gyu

  Support Role
• 
  Seo Hyun Chul

  Cha Ho Yeol [Seon Chaek's father]

  Support Role
• 
  Yoon Yoo Sun

  Yun Deok Jeong [Seonn Chaek's mother]

  Support Role
• 
  Lee Sang Woon

  Cha Jang Ho [Seon Chaek's brother]

  Support Role
• 
  Kim Shin Bi

  Cha Du Ho [Seon Chaek's brother]

  Support Role
• 
  Song Young Jae

  [Yi Beon's head servant]

  Support Role
• 
  Kim Ah Young

  Sul Gi [Shaman]

  Support Role
• 
  Jung Ho Bin

  Jung Mun Seok [Su Gyeom's father]

  Support Role
• 
  Yoon Tae Ha

  Ma Yoon [Yi Beon's aide]

  Support Role
• 
  Jeong Hee Tae

  Do Bae Myeong [Hwa Seon's father]

  Support Role
• 
  Lee Joo Won

  [Mysterious kid]

  Support Role
• 
  Kim Young Woong

  Cho Byeong Mu [Merchant]

  Support Role

Guest Role

• 
  Yoon Chae Na

  Cho Eun Ae [Child] (Ep. 1)

  Guest Role
• 
  Choi Nam Uk

  [Boy's father] (Ep. 1)

  Guest Role
• 
  Jang Eui Don

  [Royal kitchen staff] (Ep. 1)

  Guest Role
• 
  Jung Hyun Woo

  [Tea house passerby] (Ep. 1)

  Guest Role
• 
  Kim Si Hyeon

  [Dahong club member] (Ep. 1)

  Guest Role
• 
  Yun Tae Yi

  [Dahong club member] (Ep. 1)

  Guest Role
• 
  Bae Seong Il

  [Dress shop merchant] (Ep. 1, 4-6)

  Guest Role
• 
  Min Jung Sup

  [Officer] (Ep. 2)

  Guest Role
• 
  Park Jong Bum

  [Criminal] (Ep. 2)

  Guest Role
• 
  Park No Kyeong

  [Criminal] (Ep. 2)

  Guest Role
• 
  Park Jung Eon

  [Court lady] (Ep. 2)

  Guest Role
• 
  Park Ji Won

  [Buddhist monk] (Ep. 2)

  Guest Role
• 
  Cho Bu Hyun

  [Hoseondang worker] (Ep. 2)

  Guest Role
• 
  Kim Jung Han

  [Hoseondang worker] (Ep. 2)

  Guest Role
• 
  Woo Ji Han

  Jeon Su [A Yeong's boyfriend] (Ep. 3)

  Guest Role
• 
  Seo Eun Young

  Lee A Yeong [K's best-friend] (Ep. 3)

  Guest Role
• 
  Jung Jung Ah

  Madam Jung [Deok Jeong's friend] (Ep. 3)

  Guest Role
• 
  Choi Yo Woon

  [Deok Jeong's friend] (Ep. 3)

  Guest Role
• 
  Park Jeong Min

  [Court official] (Ep. 3)

  Guest Role
• 
  Song Kyung A

  [Deok Jeong's friend] (Ep. 3)

  Guest Role
• 
  Yang Shin Ji

  [Deok Jeong's friend] (Ep. 3)

  Guest Role
• 
  Park Sung Jin

  [Seonmun club member] (Ep. 3-4)

  Guest Role
• 
  Cha Ye Ri

  [Seonmun club member] (Ep. 3-4)

  Guest Role
• 
  Park Sil Rim

  [Seonmun club member] (Ep. 3-4)

  Guest Role
• 
  Su Hyun

  [Seonmun club member] (Ep. 3-4)

  Guest Role
• 
  Lee Young Joon

  [Seonmun club member] (Ep. 3-4)

  Guest Role
• 
  Shin Jun Chul

  [Royal physician] (Ep. 3, 5)

  Guest Role
• 
  Lee Kyu Hoe

  Prince Deokseong (Ep. 4)

  Guest Role
• 
  Choi Hee Jin

  [Yi Beon's mother] (Ep. 4)

  Guest Role
• 
  Jung Soon Won

  Secretary Do (Ep. 4-6)

  Guest Role
• 
  Choi Hyun Jin

  Yi Beon [Teen] (Ep. 4, 6-7, 10, 12)

  Guest Role
• 
  Seo Min Sung

  [Hongmungwan official] (Ep. 5)

  Guest Role
• 
  Kim Do Gyeong

  [Marriage applicant] (Ep. 5-6)

  Guest Role
• 
  Lee Ki Bbeum

  [Marriage applicant] (Ep. 5-6)

  Guest Role
• 
  Son Yong Beom

  [Hongmungwan scholar] (Ep. 5-6)

  Guest Role
• 
  Oh Ki Chan

  [Hongmungwan scholar] (Ep. 5-6)

  Guest Role
• 
  Lee Jae Joon

  Jung Su Gyeom [Teen] (Ep. 6)

  Guest Role
• 
  Song Hoon

  [Professor] (Ep. 6)

  Guest Role
• 
  Lee Byeong Cheol

  [Food stand merchant] (Ep. 6)

  Guest Role
• 
  Min Sang Chul

  [Eunch] (Ep. 6-8, 11-12)

  Guest Role
• 
  Kim Jin Ok

  [Flower seller] (Ep. 7)

  Guest Role
• 
  Kwon Si Wan

  [Orphan] (Ep. 7)

  Guest Role
• 
  Kim Yeon Woo

  [Royal relative] (Ep. 7-8)

  Guest Role
• 
  Baek Gyeong Seon

  [Royal relative] (Ep. 7-8)

  Guest Role
• 
  Seo Dong Oh

  [Royal relative] (Ep. 7-8)

  Guest Role
• 
  Kim Seo Jun

  Prince Yi Gyu [Teen] (Ep. 7-9)

  Guest Role
• 
  Ok Ye Rin

  Cha Seon Chaek [Teen] (Ep. 8-9)

  Guest Role
• 
  In Gyu Sik

  [Masked man] (Ep. 8-10)

  Guest Role
• 
  Kim Han Sang

  [Physician] (Ep. 9)

  Guest Role
• 
  Ban Hye Young

  [Seller] (Ep. 9)

  Guest Role
• 
  Shin Kang Kyun

  [Paper maker] (Ep. 9)

  Guest Role
• 
  Noh Hee Joong

  [Onlooker] (Ep. 9)

  Guest Role
• 
  Han Sang Chul

  [Ginseng digger] (Ep. 9)

  Guest Role
• 
  Min Eung Shik

  [Former prime minister] (Ep. 9-10)

  Guest Role
• 
  Lee Joo Hyung

  [Government soldier] (Ep. 11)

  Guest Role
• 
  Park Do Joon

  [General] (Ep. 11-12)

  Guest Role
• 
  Hwang Sung Ho

  [Servant]

  Guest Role
• 
  Kim A Yul

  [Hwa Seon's servant]

  Guest Role
• 
  Choi Yeon Hwa

  [Queen] (Ep. 6)

  Guest Role
• 
  Lee Hwa Yeong

  [Angry widow] (Ep. 9)

  Guest Role
• 
  Oh Yong Seok

  [Officer] (Ep. 2)

  Guest Role
• 
  Justin John Harvey

  Mark [The Westerner]

  Guest Role

Writer

• 
  Jeon Seon Young