Bad Papa

Assistant Director

• 
  Oh Da Young

Director

• 
  Jin Chang Gyu

Screenwriter

• 
  Kim Sung Min

Main Role

• 
  Jang Hyuk

  Yoo Ji Cheol

  Main Role
• 
  Son Yeo Eun

  Choi Sun Joo

  Main Role
• 
  Shin Eun Soo

  Yoo Young Son

  Main Role
• 
  Ha Jun

  Lee Min U

  Main Role
• 
  Kim Jae Kyung

  Cha Ji Woo

  Main Role

Support Role

• 
  David Lee

  Kim Yong Dae [Ji Cheol's coach]

  Support Role
• 
  Jang Eui Soo

  Sang Cheol [Martial art fighter]

  Support Role
• 
  Lee Eun Saem

  Lee Seul Ki [Young Son's friend]

  Support Role
• 
  Cho Yi Hyun

  Kim Se Jung [Young Son's friend]

  Support Role
• 
  Im Seon Woo

  Wang Hye Ji [Young Son's friend]

  Support Role
• 
  Ji Yoon Ha

  Choi Sun Young [Sun Joo's sister]

  Support Role
• 
  Kim Byung Chun

  Park Min Shik [Inspector of police investigation unit]

  Support Role
• 
  Kwon Eun Bin

  Kim Sang Ah [Young Son's rival]

  Support Role
• 
  Jung Man Sik

  Ju Guk Seong [Ji Cheol's promoter]

  Support Role
• 
  Park Ji Bin

  Jung Chan Joong [CEO of Shingu Pharmaceutical]

  Support Role
• 
  Lee Gyu Ho

  General Manager Park

  Support Role
• 
  Kim Wook

  Lee Hyun Soo [Detective]

  Support Role
• 
  Lee Joon Hyuk

  Kim Pil Doo [Chief of illegal gambling fighting ring]

  Support Role
• 
  Yoon Bong Gil

  Park Ji Hoon [Min Woo's business partner]

  Support Role
• 
  Joo Jin Mo

  Director Jang [Ji Chul's former promoter]

  Support Role
• 
  Jung Ik Han

  Kim Jong Doo [Pil Doo's brother]

  Support Role
• 
  Jung In Ki

  Cha Seung Ho [Ji Woo's father]]

  Support Role
• 
  Shin Woo Gyum

  Kim Dae Sung [Researcher and PhD assistant]

  Support Role
• 
  Choi Yoon Ra

  Choi Seon Yeong

  Support Role
• 
  Kwon Dong Won

  Kang Sang Moon

  Support Role
• 
  Kwak Jin Seok

  Jin Sang Goo

  Support Role
• 
  An Jeong Gyun

  Jin Yeong Hoon

  Support Role
• 
  Choi Ki Seob Support Role
• 
  Ahn Da Eun Support Role

Guest Role

• 
  Jung Sung Ho

  [Boxing match commentator]

  Guest Role
• 
  Kim Si Eun

  Choi Sun Joo [Young]

  Guest Role
• 
  Kim Seung Hyun

  Kim Yoon Soo [Ji Cheol's friend]

  Guest Role
• 
  Hong In

  Yong Woo [Brain-tumour patient who took part in clinical trial]

  Guest Role
• 
  Kang Ji Woo

  Yoo Young Son [Young]

  Guest Role
• 
  Yu Je Geon

  Kim Yong Dae [Young]

  Guest Role
• 
  Mi Ram

  Han So Ra

  Guest Role
• 
  Lim Dong Yoon

  [Moneylender]

  Guest Role
• 
  Chun Myung Hoon

  [Himself]

  Guest Role
• 
  Baek Eun Kyung

  [Sun Joo's colleague in departmental store]

  Guest Role
• 
  Jun Eun Mi

  [Restaurant boss]

  Guest Role
• 
  Jung Kang Hee

  [Photographer]

  Guest Role
• 
  Lee Heon Ju

  Mi Ok

  Guest Role
• 
  Jo Seung Yeon

  [Nurse]

  Guest Role
• 
  Yoon Seo Ah

  Wang Hye Ji

  Guest Role
• 
  Han Sang Chul

  [Bus driver]

  Guest Role
• 
  Han Ji Eun

  [Resident #2]

  Guest Role
• 
  Jun Sung Won

  [Min Woo's 2nd coach]

  Guest Role
• 
  Henny Savenije

  Freddie

  Guest Role
• 
  Baek In Kwon

  [Woodpecker] (Ep. 24)

  Guest Role
• 
  Yoon Young Min

  [Jury judge]

  Guest Role
• 
  Seo Yun Hyuk

  Jang Eun Hyuk

  Guest Role
• 
  Park Yoon Young

  [Person asks for Young Son's autograph]

  Guest Role
• 
  Lee Shi Woo

  Joon Seo [Min Woo's younger brother]

  Guest Role
• 
  Shim Hye Yun

  Yoo Young Son [Young]

  Guest Role
• 
  Lee Si Young

  [Bag store manager]

  Guest Role
• 
  Kang In Gi Guest Role
• 
  Kim Ro Sa Guest Role
• 
  Park Pal Young Guest Role
• 
  Woo Sang Jun Guest Role
• 
  Song Yoo Ha Guest Role
• 
  Choi Young Guest Role
• 
  Ok Joo Ri Guest Role
• 
  Chae Hyung Won Guest Role
• 
  Kim Hwan Guest Role
• 
  Park Chan Woo Guest Role
• 
  Ahn Dong Yeob Guest Role

Bit part

• 
  Lee Sang Hoon Bit part

Unknown

• 
  Yoon To Wang Unknown
• 
  Song Ha Rim Unknown
• 
  Choi Sang A Unknown
• 
  Kim Seung Jun Unknown
• 
  Yoon Sung Won Unknown
• 
  Jang Joon Ho Unknown