To My Beloved Thief

Main Role

• 
  Nam Ji Hyun

  Hong Eun Jo / Hong Gil Dong

  Main Role
• 
  Moon Sang Min

  Yi Yeol / Grand Prince Do Wol

  Main Role
• 
  Hong Min Ki

  Im Jae I

  Main Role
• 
  Han So Eun

  Sin Hae Rim

  Main Role

Support Role

• 
  Ha Seok Jin

  Yi Gyu [King of Joseon]

  Support Role
• 
  Choi Won Young

  Im Sa Hyeong [Jae I's father]

  Support Role
• 
  Lee Seung Woo

  Seo Do Hyeong / "Dae Chu" [Yeol's escort warrior]

  Support Role
• 
  Kim Jung Nan

  [Queen Dowager / Yeol's mother]

  Support Role
• 
  Kim Suk Hoon

  Hong Min Jik [Eun Jo's father]

  Support Role
• 
  Seo Young Hee

  Chun Seom [Eun Jo's mother]

  Support Role
• 
  Song Ji Ho

  Hong Dae Il [Eun Jo's elder brother]

  Support Role
• 
  Lee Jin Hee

  Dong Ju Daek [Eun Jo's servant]

  Support Role
• 
  Hong Woo Jin

  Seok Sam [Ambassador's slave]

  Support Role
• 
  Oh Jung Taek

  Jeom Baek [Government slave at medical office]

  Support Role
• 
  Choi Kwang Il

  Han Seung Rok [Prime minister]

  Support Role
• 
  Kim Ji Su

  Queen Sin [Hae Rim's aunt]

  Support Role
• 
  Song Ji Woo

  Geum Nok / "Suk Yong" [Gyu's concubine]

  Support Role
• 
  Do Sang Woo

  Im Seung Jae [Sa Hyeong's eldest son]

  Support Role
• 
  Moon Tae Yu

  Kang Yun Bok [Police inspector]

  Support Role
• 
  Park Chan Woo

  Sergeant Park [Yun Bok's subordinate]

  Support Role
• 
  Lee Kyu Han

  Sin Jin Won [Hae Rim's elder brother]

  Support Role
• 
  Bang Eun Jung

  Kkot Sim [Hae Rim's slave]

  Support Role
• 
  Baek Jae Woo

  Kim Seung Baek [Jae I and Dae Il's friend]

  Support Role
• 
  Yoo Su Yeon

  No Eul [Gisaeng from Uiju]

  Support Role
• 
  Lee Jae Nam

  Heuk Geom [Satgat warrior]

  Support Role

Guest Role

• 
  Son Byung Ho

  Chief censor Kim [Ambassador] (Ep. 1)

  Guest Role
• 
  Seol Ji Won

  Kim Hong Yeon [Ambassador's daughter] (Ep. 1)

  Guest Role
• 
  Shin Ha Jun

  [Bookseller] (Ep. 1)

  Guest Role
• 
  Han Ji Eun

  [Shopkeeper] (Ep. 1)

  Guest Role
• 
  Na Ho Sook

  [Gil Dong’s beneficiary] (Ep. 1)

  Guest Role
• 
  Park Jae Wan

  [Official] (Ep. 2)

  Guest Role
• 
  Park Yong

  [Official] (Ep. 2)

  Guest Role
• 
  Kang Seong Hwa

  [Patrolman] (Ep. 2)

  Guest Role
• 
  Jung Ah Mi

  [Chief censor Kim’s wife] (Ep. 2)

  Guest Role
• 
  Hong Ju Won

  [Royal investigation bureau officer] (Ep. 6–7)

  Guest Role
• 
  Kim Yun Seul

  Hong Eun Jo [Child]

  Guest Role
• 
  Lim Jung Min

  [Man]

  Guest Role
• 
  Yoo Yi Jae

  [Soldier]

  Guest Role
• 
  Yoo Byung Soo

  [Wayfarer]

  Guest Role
• 
  Song Ha Na

  [Courtesan]

  Guest Role
• 
  Kim Kwan Jang

  [Stable keeper]

  Guest Role
• 
  Kim Nam Ho

  [State minister]

  Guest Role
• 
  Yoo Hyo Jong

  [Elderly patient]

  Guest Role
• 
  Koo Min Hyuk

  [Palanquin carrier]

  Guest Role
• 
  Lee Da Won

  [Concubine's child]

  Guest Role
• 
  Kim Do Ha

  [Concubine's child]

  Guest Role
• 
  Kim Jung Han

  [Chinese interpreter]

  Guest Role
• 
  Park In Guk

  [Confucian academy student]

  Guest Role
• 
  Uhm Tae Ok

  [Chief censor Kim’s servant]

  Guest Role
• 
  Kim Jae Wook Guest Role

Unknown

• 
  Han Ji Hye Unknown