Full cast of I Hear Your Voice

Lee Bo-young

Jang Hye-Sung

18 episodes

Lee Jong-suk

Park Soo-Ha

18 episodes

Yoon Sang-hyun

Cha Kwan-Woo

18 episodes

Lee Da-hee

Seo Do-Yeon

18 episodes

Jung Woong-in

Min Joon-Kook

18 episodes

Kim Hae-sook

Eo Choon-Sim

18 episodes

Kim Kwang-kyu

Kim Kong-Sook

18 episodes

Jeong Dong-hwan

Seo Dae-Seok

18 episodes

Kim Ga-eun

Ko Sung-Bin

18 episodes

Kim So-hyun

Jang Hye-Sung (young)

18 episodes

Goo Seung-hyun

Park Soo-Ha (young)

18 episodes

Kim Soo-yeon

Moon Dong-hee

18 episodes

Kim Mi-kyeong

Jeon Young-Ja

4 episodes