The Nice Guy

Director

• 
  Song Hae Sung

Screenwriter

• 
  Kim Woon Kyung

Main Role

• 
  Lee Dong Wook

  Park Seok Cheol

  Main Role
• 
  Lee Sung Kyung

  Kang Mi Yeong

  Main Role
• 
  Park Hoon

  Kang Tae Hun

  Main Role
• 
  Ryu Hye Young

  Park Seok Hui

  Main Role
• 
  Oh Na Ra

  Park Seok Gyeong

  Main Role

Support Role

• 
  Cheon Ho Jin

  Park Sil Gon [Seok Cheol's father]

  Support Role
• 
  Park Myung Shin

  Cho Mak Sun [Seok Cheol's mother]

  Support Role
• 
  Choi E Jun

  Hyeong Geun [Seok Gyeong's son]

  Support Role
• 
  Park Mi Hyun

  Yun Hye Suk [Mi Yeong's mother]

  Support Role
• 
  Kim Do Yoon

  Yun Byeong Su [Detective]

  Support Role
• 
  Moon Tae Yu

  Jang Gi Hong [Seok Cheol’s high school classmate]

  Support Role
• 
  Park Sung Yun

  Ko Jeong Nim [Seok Gyeong's friend]

  Support Role
• 
  Lee Moon Sik

  Kim Chang Su [Gangster Leader]

  Support Role
• 
  Han Jae Young

  O Sang Yeol [Chang Su's subordinate]

  Support Role
• 
  Park Doo Shik

  Son Heung Man [Gangster]

  Support Role
• 
  Cha Shi Won

  Lee Du Sik [Gangster]

  Support Role
• 
  O Seung Baek

  U Seok [School Bully]

  Support Role
• 
  Kang Bin

  Im Bok Cheon [Tae Hun's subordinate]

  Support Role
• 
  Han Min

  Cheon Ho [Tae Hun's driver and bodyguard]

  Support Role
• 
  Yoo Seung Mok

  "Long Stick" [Sil Gon's junior]

  Support Role
• 
  Park Won Sang

  Kim Jin Ho

  Support Role
• 
  Lee Jung Hyun

  Yeon Gi

  Support Role

Guest Role

• 
  Kim Seon Gyeong

  [Poetry student] (Ep. 1)

  Guest Role
• 
  Kim Min Che

  [Poetry student] (Ep. 1)

  Guest Role
• 
  Heo Seon Haeng

  [Poetry student] (Ep. 1)

  Guest Role
• 
  Jang Joon Hyun

  [Music producer] (Ep. 1)

  Guest Role
• 
  Jo Young Mi

  [Nursing home caregiver] (Ep. 1)

  Guest Role
• 
  Jang Joon Ho

  Gi Su [Banker] (Ep. 2)

  Guest Role
• 
  Jung Eun Ran

  [Janitress] (Ep. 2)

  Guest Role
• 
  Kim Jae Ho

  [Police officer] (Ep. 2)

  Guest Role
• 
  Kwak Soo Jung

  [Restaurant owner] (Ep. 2)

  Guest Role
• 
  Kwak Jin

  [Tae Hun's associate] (Ep. 2)

  Guest Role
• 
  Lee Yoo Jung

  [Hospital director's wife] (Ep. 2)

  Guest Role
• 
  Kim Gyeong Min

  [Seok Gyeong's ex-husband] (Ep. 2)

  Guest Role
• 
  Shin Jun Chul

  [Audition judge] (Ep. 3)

  Guest Role
• 
  Kwon Jae Hwan

  Mr. Hwang (Ep. 3-4)

  Guest Role
• 
  Kang Gu Ha

  [Detective] (Ep. 3-4)

  Guest Role
• 
  Uhm Tae Ok

  [Mr. Hwang’s boss] (Ep. 3-4)

  Guest Role
• 
  Jwa Chae Won

  [Bully student] (Ep. 4-5)

  Guest Role
• 
  Park Joo Young

  [Banker] (Ep. 5)

  Guest Role
• 
  Lee Yeon Joo

  [Nursing program host] (Ep. 5)

  Guest Role
• 
  Im Sung Kyun

  Jang Hak (Ep. 5-6)

  Guest Role
• 
  Kwak Ji Yoo

  [Nurse] (Ep. 6)

  Guest Role
• 
  Park Geon Rak

  [Usher] (Ep. 6)

  Guest Role
• 
  Lee Do Goon

  [Loan shark] (Ep. 6)

  Guest Role
• 
  Ha Seung Yeon

  [Music executive] (Ep. 6-7)

  Guest Role
• 
  Song Hoon

  [CEO] (Ep. 7)

  Guest Role
• 
  Cha Young Mi

  [Cafe employee] (Ep. 8)

  Guest Role
• 
  Hwang Dae Ki

  Nup Chi

  Guest Role
• 
  Park No Kyeong

  Yun Il Jung

  Guest Role
• 
  Son In Yong

  Captain Jang

  Guest Role
• 
  Park Young Bin

  Yoo Jae Bong

  Guest Role
• 
  Park Seo Kyung

  Kang Mi Yeong [Young]

  Guest Role
• 
  Lee Seung Heon

  Park Seok Cheol [Young]

  Guest Role
• 
  Baek Hyeon Ju

  [Gambling den boss]

  Guest Role
• 
  Kim Kang Hee

  [Music class manager] (Ep. 1, 6)

  Guest Role
• 
  Kwon Ji Han Guest Role
• 
  Kim Dae Geun

  [Changsoo Gang member]

  Guest Role