While You Were Sleeping

Suzy

Nam Hong-joo

이종석

Jeong Jae-chan

Jung Hae-in

Han Woo-tak

이상엽

Lee Yoo-beom

Hwang Young-hee

Yoon Moon-seon

Shin Jae-ha

Jeong Seung-won

Kim Won-hae

Choi Dam-dong

Park Jin-joo

Moon Hyang-mi

Lee Ki-young

Park Dae-young

Ko Sung-hee

Shin Hee-min

Bae Hae-sun

Son Woo-joo

Min Sung-wook

Lee Ji-gwang

Oh Eui Sik

Bong Doo-hyeon

Lee Yoo-jun

Oh Gyeong-han

Son San

Min Jeong-hee

Lee Bong-ryun

Go Pil-sook

표예진

Cha Yeo-jeong

Lee Do-gyeom

Myeong Dae-goo

남다름

Young Jeong Jae-chan

신이준

Young Nam Hong-joo

이재균

Choi Dam-dong

고우림

Young Jeong Seung-won / Chan-ho

김다예

Kang Cho Hee [Dae Hee's sister / Barista]

Kim So-hyun

Park So Yoon

백성현

Do Hak Young [Cable Man]

Jang So-yeon

Do Geum Sook [So Yoon's mother]

문아람

Yu Beom's firm's receptionist

강기영

Kang Dae Hee

Hong Kyung

Choi Wook Hyeon [Deserter]

Uhm Hyo-seop

Park Jun Mo [So Yoon's father]

Jeon Kuk-hwan

Soo Kyung's father

Kim Ki-cheon

Lee Hwan's father

Jang Hyun-sung

Jung Il Seung

조미녀

Ji Kwang's Paralegal

차정원

Yoo Soo Kyung [Archer]

문용석

Lee Hwan [Tae Min's student]

Ryu Tae-ho

Professor Moon Tae Min

정현석

Chan Ho's doctor

Lee Jae-won

Jo Yoon Pyo [Phone Buyer]

이민재

Seung Won's classmate