While You Were Sleeping

Suzy

Nam Hong-joo (32 episodes)

Jong-Suk Lee

Jeong Jae-chan (32 episodes)

Jung Hae-in

Han Woo-tak (32 episodes)

Lee Sang-yeob

Lee Yoo-beom (32 episodes)

Hwang young hee

Yoon Moon-seon (32 episodes)

Shin Jae-Ha

Jeong Seung-won (32 episodes)

Kim Won-hae

Choi Dam-dong (32 episodes)

Park Jin-Joo

Moon Hyang-mi (32 episodes)

Lee Ki-young

Park Dae-young (32 episodes)

Ko Sung-hee

Shin Hee-min (32 episodes)

Bae Hae-seon

Son Woo-joo (32 episodes)

Min Sung-wook

Lee Ji-gwang (32 episodes)

Oh Ui Shik

Bong Doo-hyeon (32 episodes)

Lee Yoo-Joon

Oh Gyeong-han (32 episodes)

Son San

Min Jeong-hee (32 episodes)

Bong-ryeon Lee

Go Pil-sook (32 episodes)

Pyo Ye-Jin

Cha Yeo-jeong (32 episodes)

Lee Do-Gyeom

Myeong Dae-goo (32 episodes)

Nam Da-reum

Young Jeong Jae-chan (32 episodes)

Shin Yi-Joon

Young Nam Hong-joo (32 episodes)

Lee Jae-kyoon

Choi Dam-dong (32 episodes)

Ko Woo-rim

Young Jeong Seung-won / Chan-ho (32 episodes)

Kim Da-yea

Kang Cho Hee [Dae Hee's sister / Barista] (9 episodes)

Kim So-hyun

Park So Yoon (8 episodes)

Baek Sung-Hyun

Do Hak Young [Cable Man] (8 episodes)

Jang So-yeon

Do Geum Sook [So Yoon's mother] (6 episodes)

Moon Ah-ram

Yu Beom's firm's receptionist (6 episodes)

Hong Kyung

Choi Wook Hyeon [Deserter] (5 episodes)

Uhm Hyo-seop

Park Jun Mo [So Yoon's father] (5 episodes)

Kang Ki-young

Kang Dae Hee (5 episodes)

Jeon Kuk-hwan

Soo Kyung's father (5 episodes)

Kim Ki-cheon

Lee Hwan's father (5 episodes)

Lee Jae-Won

Jo Yoon Pyo [Phone Buyer] (4 episodes)

Jang Hyun-sung

Jung Il Seung (4 episodes)

Cha Jung-Won

Yoo Soo Kyung [Archer] (4 episodes)

Cho Mi-nyeo

Ji Kwang's Paralegal (4 episodes)

문용석

Lee Hwan [Tae Min's student] (4 episodes)

Ryu Tae-ho

Professor Moon Tae Min (4 episodes)

Jung Hyun-Suk

Chan Ho's doctor (4 episodes)

Eun-woo Lee

Ha Joo An [IV Drip Serial Killer] (3 episodes)

Son Byung-ho

President Go (3 episodes)

Lee Min-jae

Seung Won's classmate (3 episodes)

Yoo In-soo

Seung Won's classmate (3 episodes)

Yoon Yong-hyeon

Park Dae Young [Phone thief] (2 episodes)

Lee Jung-eun

Jae Chan's mother (2 episodes)

Shin Eun-Jung

Kim Joo Young (2 episodes)

Yeo Hoi-hyeon

Lee Yu Beom [Young] (2 episodes)

Ju-seok Lee

Presiding judge (2 episodes)

Hong Hee-won

Doctor Expert Witness (2 episodes)

Choi Won-young

Nam Chul Doo [Hong Joo's father] (2 episodes)

Jo Yeon-Ho

Im Se Young [Witness] (2 episodes)

Park Young-soo

Car salesman (1 episode)

Lim Ga-Young

High school student (1 episode)

Shim Wan-jun

Man with mustache (1 episode)

Kim Do-Hye

Kindergartner (1 episode)

Kim Su-in

Thief's daughter (1 episode)

Kang Shin-Hyo

Gyoo Won (1 episode)

Yoon Kyun-sang

Lovers (1 episode)

Lee Sung-kyung

Lovers (1 episode)

Lee Ga-Ryeong

Hospital Coordinator (1 episode)

Woo Sung-min

Kindergartner (1 episode)

Hye-Ryeon Park

Screenplay (32 episodes)

Lee Hae-ri

Theme Song Performance (32 episodes)

Suzy

Theme Song Performance (32 episodes)

Kang Min-Kyung

Theme Song Performance (32 episodes)

Roy Kim

Theme Song Performance (32 episodes)

Henry Lau

Theme Song Performance (32 episodes)

Park Se-jun

Music (32 episodes)

Oh Choong-hwan

Director (32 episodes)

Park Soo-jin

Co-Director (32 episodes)