Ji Chang-wook
Yoon Gyeo-rea (16 eps)
Choi Soo-young
Seo Yeon-joo (16 eps)
Sung Dong-il
Kang Tae-sik (16 eps)
Won Ji-an
Ha Jun-kyung (16 eps)
Nam Tae-hun
Jang Seok-jun (16 eps)
Yang Hee-kyung
Yeom Soon-ja (16 eps)
Kil Hae-yeon
Choi Deok-ja (16 eps)
Yoo Soon-woong
Hwang Cha-yong (16 eps)
Jeon Chae-eun
Yoo Seo-jin (16 eps)
Shin Ju-hwan
Yang Chi-hun (16 eps)
Park Se-jun
Wang Jin-gu (16 eps)
Park Jin-joo
Se Hee (3 eps)
Min Woo-hyuk
Pyo Gyu-Tae (3 eps)
Jin Mo
Musical director (1 eps)
Lee Kyu-young
Audition security staff (1 eps)
Kim Si-eun
Kang Soo-Jin (1 eps)
Kim Bong-soo
Patient (1 eps)
Lee You-mi
New volunteer (1 eps)