Silenced

Gong Yoo

Kang In-ho

Jung Yu-mi

Seo Yoo-jin

Kim Hyeon-soo

Kim Yeon-doo

Jung In-seo

Jin Yoo-ri

Baek Su-ho

Jeon Min-soo

Jang Kwang

Principal / Principal's Brother

Kim Joo-ryoung

Yoon Ja-ae

Kim Min-sang

Park Bo-hyeon

Lim Hyun-sung

Young-hoon

Jeon Kuk-hwan

Attorney Hwang

Choi Jin-ho

Prosecutor

Kwon Hong-suk

Judge

Uhm Hyo-seop

Police Officer Jang

Park Hye-jin

Principal's Wife

Kim Ji-young

In-ho's Mother