Entertainer

Director

• 
  Hong Sung Chang
• 
  Lee Gwang Young

Screenwriter

• 
  Yoo Young Ah

Main Role

• 
  Ji Sung

  Shin Suk Ho

  Main Role
• 
  Lee Hye Ri

  Jung Geu Rin

  Main Role
• 
  Kang Min Hyuk

  Jo Ha Neul

  Main Role
• 
  Chae Jung An

  Yeo Min Joo

  Main Role

Support Role

• 
  Gong Myung

  Kyle Lee/Lee Bang Geul [Band member]

  Support Role
• 
  Lee Tae Sun

  Na Yun Soo [Band member]

  Support Role
• 
  Lee Byung Hun

  Seo Jae Hoon [Band member]

  Support Role
• 
  Jeong Man Sik

  Jang Man Sik [Songwriter]

  Support Role
• 
  Ahn Nae Sang

  Director Byun

  Support Role
• 
  Heo Jun Seok

  Kim Joo Han

  Support Role
• 
  Jeon Noh Min

  Lee Joon Seok [KTOP's CEO]

  Support Role
• 
  Jung Kyu Soo

  [Suk Ho's father]

  Support Role
• 
  Ahn Hyo Seop

  Kim Jin Woo [Jackson's leader]

  Support Role
• 
  Sung Byung Sook

  [Seok Ho's mother]

  Support Role
• 
  Jang Won Young

  Mr. Ma [Reporter]

  Support Role
• 
  Cho Yun Seo

  Lee Ji Yeong

  Support Role
• 
  Jo Bok Rae

  Jo Sung Hyun [Ha Neul's late brother]

  Support Role
• 
  Maeng Sang Hoon

  [Jae Hoon's father]

  Support Role
• 
  Choi Ji Na

  [Jae Hoon's mother]

  Support Role
• 
  Jo Yeon Ho

  Na Chan Hee [Yun Soo's son]

  Support Role
• 
  Kim Kyung Ryong

  [Ji Yeong's father]

  Support Role
• 
  Lee Rang Seo

  [Female college student]

  Support Role
• 
  Choi Min Yeong

  Lee Kyung Soo

  Support Role
• 
  Park Myung Shin

  [Jo Ha Neul’s mother]

  Support Role

Guest Role

• 
  Kim Ho Chang

  [Manager]

  Guest Role
• 
  Tae Hang Ho

  [Accident victim]

  Guest Role
• 
  Sung Ji Ru

  Sound Source Broker Kim (Ep. 1-2)

  Guest Role
• 
  Lee Han Wi

  [Broadcasting company director](Ep. 1)

  Guest Role
• 
  Choi Sung Min Guest Role
• 
  Jo Jae Ryong Guest Role
• 
  Park Shin Hye

  Miss Park (Ep. 3)

  Guest Role
• 
  Min Do Hee

  [Luna Ex-KTOP Trainee/Twinkle] (Ep. 4)

  Guest Role
• 
  Kim Ki Ri

  (Ep.4)

  Guest Role
• 
  Seo Kang Jun

  Lee Sang Won (Ep. 7-8)

  Guest Role
• 
  Oh Jung Se

  [Prosecutor] (Ep. 7)

  Guest Role
• 
  Ahn Suk Hwan

  [Psychiatrist](Ep.6)

  Guest Role
• 
  Kwon Hae Hyo

  [Entertainment Station chief] (Ep. 6)

  Guest Role
• 
  Jo Eun Ji

  Manager Jo (Ep.10)

  Guest Role
• 
  Zhou Mi

  [The Show MC](Ep.7)

  Guest Role
• 
  Ken

  [The show MC] (Ep. 7)

  Guest Role
• 
  Kim So Hye

  Choi Ga Eun (Ep.11-12)

  Guest Role
• 
  Park Ji Yoon

  [Interviewer](Ep.7)

  Guest Role
• 
  Jung Ye Rin

  [The Show MC] (Ep. 7)

  Guest Role
• 
  Lee Hyun Woo

  Choi Jun Ha (Ep.14)

  Guest Role
• 
  Park Eun Bin

  Soo Hyun [Drummer] (Ep. 18)

  Guest Role
• 
  Jung Chan

  [Wild Entertainment CEO](Ep.17-18)

  Guest Role
• 
  Park Young Soo

  [CF director] (Ep. 17)

  Guest Role
• 
  Im Do Hwa

  [The Show MC] (Ep. 18)

  Guest Role
• 
  Jang Hang Joon

  [Ha Neul's drama director] (Ep. 18)

  Guest Role
• 
  Kim Jae Il Guest Role
• 
  Dong Yoon Seok Guest Role
• 
  J.Vin

  Jackson band member

  Guest Role
• 
  Sun

  Jackson band member

  Guest Role
• 
  Sign

  Jackson band member

  Guest Role
• 
  J.Jun

  Jackson band member

  Guest Role
• 
  Kim Min Hyuk

  Jackson band member

  Guest Role
• 
  Joey Albright

  [Top investor]

  Guest Role
• 
  Lee Seung Hyub

  [MC](Ep.18)

  Guest Role
• 
  Kwon Na Ra

  Song Hee (Ep.1)

  Guest Role
• 
  Ha Kyung Min Guest Role
• 
  Lee Tae Gyeom

  (Ep.2)

  Guest Role
• 
  Lee Ha Joon

  (Ep.2)

  Guest Role
• 
  Han Dong Hwan Guest Role
• 
  Yoon Gi Won

  PD

  Guest Role
• 
  Kim Ji Eun

  [Female student]

  Guest Role
• 
  Park Do Joon

  (Ep.2)

  Guest Role
• 
  Lee Chae Kyung

  [Lawyer] (Ep.1)

  Guest Role
• 
  Seo Kwang Jae Guest Role
• 
  Jo Wan Ki

  [Composer]

  Guest Role
• 
  Seol Chang Hee Guest Role
• 
  Lee Seo Young

  [K-Top singer]

  Guest Role

Unknown

• 
  Choi Seung Il Unknown
• 
  Lee Jin Hee Unknown
• 
  Yang Seung Kul Unknown
• 
  Kim Byung Chun Unknown

Bit part

• 
  Park Chan Min

  [Himself]

  Bit part
• 
  Kim Kwang Hyun

  police officer

  Bit part