Telefon

Park Shin-hye

Seo-yeon

Jeon Jong-seo

Young-sook

Kim Sung-ryung

Eun-ae

EL

Ja-ok

Park Ho-san

Mr. Kim

Oh Jung-se

Seong-ho

Lee Dong-hwi

Baek Min-hyun

Um Chae-young

Young Seo-yeon

Jo Kyung-sook

Sun-hee

Kim Min-ha

Young Sun-hee

Moon Chang-gil

Junk Dealer

Ryu Kyung-soo

Junior Police

Song Yo-sep

Senior Police

Lee Zoo-young

Woman Who Picked Up a Phone (voice)

Park Hyoung-soo

Man Who Picked Up a Phone (voice)

신정만

Real estate agent

강지현

Psychological counselor

이규현

Doctor

김명지

News anchor (voice)

이은정

News anchor (voice)