Who Is She!

Director

• 
  Park Yong Soon

Screenwriter

• 
  Heo Seung Min

Main Role

• 
  Kim Hae Sook

  O Mal Sun

  Main Role
• 
  Jung Ji So

  O Du Ri / Emily

  Main Role
• 
  Jin Young

  Daniel Han

  Main Role
• 
  Chae Won Bin

  Choi Ha Na

  Main Role

Support Role

• 
  In Gyo Jin

  Choi Min Seok [Ji Suk's husband]

  Support Role
• 
  Seo Young Hee

  Ban Ji Suk [Mal Sun's daughter]

  Support Role
• 
  Cha Hwa Yun

  Kim Ae Sim [Daniel's aunt]

  Support Role
• 
  Jeong Bo Seok

  Park Gap Yong [Mal Sun's old friend]

  Support Role
• 
  Kim So Won

  Seo Chan Mi [Unis Entertainment's vocal director]

  Support Role
• 
  Yoo Jung Hoo

  Park Gap Yong / Park Jun [Young]

  Support Role
• 
  Lee Hwa Kyum

  Li Na [Daniel's friend / Unis Entertainment's Performance & Marketing director]

  Support Role
• 
  Jung Ji Yoon

  Kang Yeong Eun [GC Construction Team director]

  Support Role
• 
  Shin Shin Ae

  Sin Sun Ae [Mal Sun's friend]

  Support Role
• 
  Kim Byung Ok

  [Mysterious taxi driver / Photographer]

  Support Role
• 
  Yu E

  Olla [Idol trainee]

  Support Role
• 
  Jang Seo Won

  Jay [Idol trainee]

  Support Role
• 
  Lee Dal

  Hoi An [Unis Entertainment's choreographer]

  Support Role
• 
  Oh Ji Yeon

  Jun Hui [[Unis Entertainment's songwriter and producer]

  Support Role
• 
  Lee Jee Hyeon

  Min A [Idol trainee]

  Support Role
• 
  Kim Sung Won

  Park Ja Yeong [Gap Yong's son]

  Support Role
• 
  Park Young Soo

  Park Yeong Jun [Yeong Seok's big brother]

  Support Role
• 
  Seo Joon

  Park Yeong Seok [Restaurent chef]

  Support Role
• 
  Cha Jae I

  Kim Ae Sim [Young]

  Support Role

Guest Role

• 
  Hwang Geum Byul

  [Ji Suk's friend] (Ep. 1)

  Guest Role
• 
  Shim Hyung Tak

  [F Music CEO] (Ep. 1)

  Guest Role
• 
  Lee Yong Yi

  Jang Gwi Rye [Mal Sun's neighbor] (Ep. 1, 5-7)

  Guest Role
• 
  Choi Jung Woo

  Byeon Gang Seok [Gwi Rye's husband] (Ep. 1, 5-7)

  Guest Role
• 
  Shin Yeon Suk

  O Cheon Bun [Mal Sun's neighbor] (Ep. 1, 5-7)

  Guest Role
• 
  Kim Sung Yong

  [GC Construction Team director] (Ep. 2)

  Guest Role
• 
  Park Ju Ri

  [Boutique saleswoman] (Ep. 2)

  Guest Role
• 
  Ha Hyun Sang

  Cheon Ho [Mal Sun's first love] (Ep. 2-4)

  Guest Role
• 
  Sung Chang Hoon

  [Royal Salon manager - 50 years ago] (Ep. 2, 5)

  Guest Role
• 
  Kim Ji Yoo

  O Mal Sun [Child] (Ep. 2, 8)

  Guest Role
• 
  Jeong Wook

  [GC Construction CEO] (Ep. 2, 10, 12)

  Guest Role
• 
  Cha Ye Jun

  [GC Construction's employee] (Ep. 3)

  Guest Role
• 
  Jang Ji Yong

  [Harasser] (Ep. 3)

  Guest Role
• 
  Kim Yoon Joo

  [Hair salon owner] (Ep. 3)

  Guest Role
• 
  Lee Kwang Hee

  Sang Ju [Cheon Ho's brother] (Ep. 3-4)

  Guest Role
• 
  Jang Yong Bok

  [Tracksuit man] (Ep. 5)

  Guest Role
• 
  Ma Jung Pil

  Kwak Seung Beom (Ep. 6)

  Guest Role
• 
  Han Mi Ja

  [Tae Jin A's fan] (Ep. 6)

  Guest Role
• 
  Tae Jin Ah

  [Himself / Singer] (Ep. 6)

  Guest Role
• 
  Choi Young Min

  [Interviewer] (Ep. 7)

  Guest Role
• 
  Choi Hui Seung

  [MNS PD] (Ep. 7)

  Guest Role
• 
  Kim Ri Han

  [Kim Ae Sim's manager - 50 years ago] (Ep. 7, 11)

  Guest Role
• 
  Yeo Min Goo

  Jang Hwan Min [Entertainment CEO] (Ep. 8)

  Guest Role
• 
  Noh Sung Eun

  [Vlogger] (Ep. 8-9)

  Guest Role
• 
  Choi Hye Seo

  Ban Ji Seok [Child] (Ep. 9)

  Guest Role
• 
  Bae Eun Woo

  [Show writer] (Ep. 9)

  Guest Role
• 
  Kang Hak Soo

  [Harasser diner] (Ep. 9)

  Guest Role
• 
  Park Jun Seok

  [Taesaja member] (Ep. 9)

  Guest Role
• 
  Kim Young Min

  [Taesaja member] (Ep. 9)

  Guest Role
• 
  Woo Do Im

  Yoo Ji An [Daniel's fan / stalker] (Ep. 9-11)

  Guest Role
• 
  Seo Ji Young

  Ha Yun Seol [Current wife of Ji Seok's father] (Ep. 10)

  Guest Role
• 
  Seo Eun Seo

  Ban Ji U [Yun Seol's daughter] (Ep. 10)

  Guest Role
• 
  Ahn Se Min

  Ban Seong Mun [Young] (Ep. 10)

  Guest Role
• 
  Yoo Ok Joo

  [Ban Seong Mun's sister] (Ep. 10)

  Guest Role
• 
  Kim Tae Hoon

  [Food researcher] (Ep. 10)

  Guest Role
• 
  Song Won Su

  [Diner] (Ep. 10)

  Guest Role
• 
  Lee Seung Jin

  [Reporter] (Ep. 11)

  Guest Role
• 
  Lee Young Jae

  [Reporter] (Ep. 11)

  Guest Role
• 
  Go Yoon Bin

  Ju Mi Jin [CEO of Vplus Media Group / Min Seok's first love]

  Guest Role
• 
  Seo Ye Bin

  [Trainee]

  Guest Role
• 
  Kim Do Yun

  Ban Ji Suk [Teen] (Ep. 3)

  Guest Role
• 
  Han Gyeong Mi

  [Restaurant employee] (Ep. 3)

  Guest Role
• 
  Park Hyeon Jeong

  [Boutique saleswoman] (Ep. 2)

  Guest Role
• 
  Song Ha Jin

  [Idol trainee]

  Guest Role
• 
  Kim Da Yeong

  [Photo girlfriend] (Ep. 10)

  Guest Role
• 
  Park Jae Yeong

  Ban Seong Mun

  Guest Role
• 
  Lee Ae Na

  [Cleaning lady] (Ep. 1, 11)

  Guest Role
• 
  Lee Hae Won

  Jeong Sik (Ep. 6)

  Guest Role
• 
  Heo Ye Seul

  [Park bench girl] (Ep. 4)

  Guest Role

Unknown

• 
  Oh Dae Sung Unknown
• 
  Kim Rin Ah Unknown
• 
  Kim Tae Hoon Unknown
• 
  Kim Zio Unknown