Park Min-young
Sung Deok-mi (16 eps)
Kim Jae-wook
Ryan Gold / Heo Yoon-jae (16 eps)
Ahn Bo-hyun
Nam Eun-gi (16 eps)
Jung Jae-won
Cha Shi-an (16 eps)
Kim Bo-ra
Cindy / Kim Hyo-jin (16 eps)
Park Jin-joo
Lee Sun-joo (16 eps)
Kim Mi-kyeong
Ko Young-sook (16 eps)
Maeng Sang-hun
Sung Geun-ho (16 eps)
Hong Seo-young
Choi Da-In (16 eps)
Kim Sun-young
Eom So-hye (16 eps)
Seo Ye-hwa
Yoo Kyung-a (16 eps)
Jung Won-chang
Kim Yoo-sub (16 eps)
Im Ji-gyu
Kang Seung-min (16 eps)
Lee Il-hwa
Kong Eun-young (16 eps)
Park Myung-shin
Nam Se-yeon (16 eps)
Amy Aleha
Art Collector (16 eps)
Yang Hee-won
Nam Eun-gi [child] (16 eps)
Kim Mi-hye
Hotel Employee (16 eps)
Noreen Joyce Guerra
Cha Shi-an's Fan (16 eps)
Kang Jeong-woo
NIS Agent (16 eps)
Yoo Yong-min
Joo-hyuk (16 eps)
Jeong Si-yul
Kang Geon-woo (16 eps)
Heo Seon-haeng
Cheum Art Museum Security Guard (16 eps)
Choi Go
Ryan Gold [child] (16 eps)
Kim So-min
childcare child (16 eps)
Jang Jae-Ha
judo gymnasium kid (16 eps)
Park So-yi
Sung Deok-mi [child] (16 eps)
Kim Chang-hoi
Uhm So Hye's assistant (16 eps)
Nam Seung-woo
[Eun Gi’s school friend] (16 eps)
Kim Dong-ha
Min Ho [Child who lost his father] (16 eps)
Park Jin-young
Ahn Myung Sub [Painter] (16 eps)
Seo Sang-won
Noh Suk [Novelist] (16 eps)
Gu Da-song
Miss Kim Mo [Runs in front of Shi Ahn's van] (16 eps)
Kim Oh-bok
[Bartender] | [Eun Gi's fan] (16 eps)
Ahn Hyun-bin
[Detective questioning fangirl museum assault] (16 eps)
Jeong Ye-nok
[Girl who asks for Shi Ahn's picture] (16 eps)
Seo Ha Yoon
[Playground girl] (16 eps)
Kim Yeon Seo
[Orphanage girl] (16 eps)
Choi Yoon-woo
[Amusement park boy] (16 eps)
Kang Hak-soo
[Furniture workshop staff] (16 eps)
Oh So-hyun
[Cha Shi An fan] (16 eps)
Lim Ga-Young
[Fan enraged over Shi Ahn's scandal] (16 eps)
Ahn Lu-ah
Sung Duk Mi (young) (16 eps)
Kim Si-eun
Syanobbang (16 eps)
Pyo Dong-jun
[Judo gym kid] (16 eps)
Kim Do-won
[Judo gym kid] (16 eps)
Kim Eun Woo
Executive Secretary Jang (16 eps)
Shin Yeon Mi
[Cha Shi An's fan, nicknamed "Shi An is Hope For Life"] (16 eps)
Yang Hee Jae
[Eun Gi's gym 'yellow belt' student] (3 eps)
Hwang Hyo-eun
Latte (2 eps)
Choi Na-Moo
Fan-girl (2 eps)
Han Hyun Uk
Member of White Ocean (1 eps)
Hwang In Ho
Member of White Ocean (1 eps)
Lee In Pyo
Member of White Ocean (1 eps)
Yoo Ji Ahn
Member of White Ocean (1 eps)
Kim Ho-chang
Ryan's psychiatrist (1 eps)
Ariane Desgagnés-Leclerc
US Art Exhibit patron (1 eps)
Lee Chae-kyung
Choi Eun-Hye (1 eps)
Choi Jae-sup
Duk Mi imagining autopsy (1 eps)
Moon Hak-Jin
Duk Mi imagining autopsy (1 eps)
Kim Yeong-ok
Duk Mi's grandmother (1 eps)
Yeo Moo-yeong
[the man Sung Duk Mi was running away from] (1 eps)
Jeong Soo-young
Fortune teller (1 eps)
Park Seul-gi
MC of Shi Ahn's fan meeting (1 eps)
Lee Hyo Bi
[child who drew Ryan Gold's face] (1 eps)
Lee Han-wi
Man Soo [Uhm So Hye's husband] (1 eps)
Ban Hye-young
Judo official (1 eps)