Who Is She: Reparto
Kim Hae-sook
Oh Mal-soon
Jung Ji-so
Oh Doo-ri
Jung Jin-young
Daniel Han
Chae Won-been
Choi Ha-na
Sowon
Chan Mi
Lee Hwa-Kyum
Li Na
Lee Kwang-hee
Sang-joo
Jung Bo-seog
Park Gap Yong
Seo Young-hee
Ban Ji Suk [Choi Ha-na's mother, Choi Min-seok's wife, Oh Mal-soon's daughter]
In Gyo-jin
Choi Min-seok
Cha Hwa-yeon
Kim Ae Sim
Lee Dal
Hoi
Oh Ji-yeon
Joon Hee
현재연
Soo Jin [member of the group Element]
Lee Ji-hyeon
Min Ah
낸시 양
Olla [member of the group Element]
장서원
Jay [member of the group Element]
Kim Sung-Won
Park Ja Young [Park Gap Yong's son]
Park Young-soo
Park Young Joon
Hong Seo-jun
Park Young Suk [Park Young Joon's brother]
Shin Shin-ae
Shin Soon Ae
Lee Yong-i
Jang Gwi Rye
Shin Yeon-sook
Oh Choon Boon
Choi Jung-woo
Byun Kang Suk
Kim Byeong-ok
Mysterious taxi driver