Pemeran When the Phone Rings

Yoo Yeon Seok (유연석)

as Baek Sa Eon

Pemeran Utama

Chae Soo Bin (채수빈)

as Hong Hui Ju

Pemeran Utama

Heo Nam Jun (허남준)

as Ji Sang U

Pemeran Utama

Jang Gyu Ri

as Na Yu Ri

Pemeran Utama

Choi Kwang Il

as Hong Il Gyeong [Chairman of Cheongwoon Ilbo]

Pemeran Pembantu

Im Chul Soo

as Kang Yeong U [Spokesperson Office manager]

Pemeran Pembantu

Choi Woo Jin

as Park Do Jae [Spokesperson Office special admin. officer]

Pemeran Pembantu

Park Sun Young

as Kim Su Yeong [Spokesperson Office admin. officer]

Pemeran Pembantu

Song Jin Hee

as An Jin Hui [Spokesperson Office admin. officer]

Pemeran Pembantu

Jung Ji Hwan

as Jung Won Bin [Sign language interpreter for President Office]

Pemeran Pembantu

Ko Sang Ho

as Jang Hyeok Jin [Reporter covering presidential office / Former war correspondent]

Pemeran Pembantu

Kim Tae Han

as Jung Sang Hun / Jung Jin Seok [Fishing spot owner]

Pemeran Pembantu

Yang Jo Ah

as Han Jin [Sign language interpretation center director]

Pemeran Pembantu

Kang Hyeon U

as Lee Tae Yeong

Pemeran Pembantu

Park Jae Yun

as [Hijacker]

Pemeran Pembantu

Han Jae Yi

as Hong In A [Hong Il Gyeong's eldest daughter]

Pemeran Pembantu

Jung Dong Hwan

as Baek Jang Ho [Baek Sa Eon's grandfather]

Pemeran Pembantu

Yoo Sung Joo

as Baek Eui Yong [Baek Sa Eon's father / Presidential candidate]

Pemeran Pembantu

Chu Sang Mi

as Sim Gyu Jin [Baek Sa Eon's mother / Negotiation expert]

Pemeran Pembantu

Oh Hyun Kyung

as Kim Yeon Hui [Hong Il Gyeong's 2nd wife]

Pemeran Pembantu

Hong Seo Joon

as Min Do Gi [Baek Eui Yong's butler and personal secretary]

Pemeran Pembantu

Son Ki Chul

as [Reporter] (Ep. 1)

Bintang Tamu

Tak Seung Bin

as [HBC staff] (Ep. 1)

Bintang Tamu

Park Gang To

as [HBC staff] (Ep. 1)

Bintang Tamu

Kim Jin

as [Interpreter] (Ep. 1)

Bintang Tamu

Lee Bum Chan

as [HBC staff director] (Ep. 1)

Bintang Tamu

Lee Gyoung Ho

as [HBC staff director] (Ep. 1)

Bintang Tamu

Kim Mi Ran

as Lee Jeong Won [Bodyguard] (Ep. 1-2)

Bintang Tamu

Lee Seung Jin

as [Reporter HBC] (Ep. 1, 3)

Bintang Tamu

Park Geon Rak

as Director Yun (Ep. 1, 7, 12)

Bintang Tamu

Kaare Svejgaard Olsen

as [Ambassador] (Ep. 1, 9)

Bintang Tamu

Ra Lee Hye Jin

as Park Hyeon Jin [Bodyguard assigned to Hui Ju] (Ep. 2)

Bintang Tamu

Lee Hyun

as [Defendant] (Ep. 2)

Bintang Tamu

Lee Heung Yun

as [Plaintiff] (Ep. 2)

Bintang Tamu

Kim Gyu Do

as [Prosecutor] (Ep. 2)

Bintang Tamu

Lee Seo Won

as [Nurse] (Ep. 2-3)

Bintang Tamu

Yeo Min Goo

as [Arsonist] (Ep. 3)

Bintang Tamu

Kim Min Suk

as [Detective] (Ep. 3)

Bintang Tamu

Jung Eun Ran

as [Caregiver] (Ep. 3)

Bintang Tamu

Kim Moon Soo

as [Government official] (Ep. 3)

Bintang Tamu

Bae Seong Il

as Park Sang Uk [Police officer] (Ep. 3-4)

Bintang Tamu

Song Young Ah

as Kim Jeong Yeon [Police officer] (Ep. 3-4)

Bintang Tamu

Min Eung Shik

as [Government official] (Ep. 3-5)

Bintang Tamu

Kang Ji Yong

as Ji Sang U [Young] (Ep. 3, 5-6)

Bintang Tamu

Song Hoon

as Han [HBC PD] (Ep. 3, 7)

Bintang Tamu

Lee Yoon Soo

as [HBC staff] (Ep. 3, 7)

Bintang Tamu

Lee Si On

as [Mysterious child in mansion] (Ep. 3, 5-6, 8-10)

Bintang Tamu

Shin Yeon Woo

as Hong Hui Ju [Young] (Ep. 3-8, 11-12)

Bintang Tamu

Hyun Seo Young

as Sin Jung Min (Ep. 4)

Bintang Tamu

Hwa Sung

as [Hair stylist] (Ep. 4)

Bintang Tamu

An Tae Gyeong

as [Restaurant staff] (Ep. 4)

Bintang Tamu

Park Gyeong Eun

as [Sign language applicant] (Ep. 4)

Bintang Tamu

Lee Su Jin

as [Event attendee] (Ep. 4)

Bintang Tamu

Han Chae Bin

as [Event attendee] (Ep. 4-5)

Bintang Tamu

Son Ye Ji

as [Event attendee] (Ep. 4-5)

Bintang Tamu

Park Chang Hoon

as [Sign language applicant] (Ep. 4-6, 8)

Bintang Tamu

Yoon Seo Yeon

as Hong In A [Young] (Ep. 4-8, 10, 12)

Bintang Tamu

Lee Jae Joon

as Baek Sa Eon [Young] (Ep. 4-12)

Bintang Tamu

Hwang Jung Yoon

as [Saleswoman] (Ep. 5)

Bintang Tamu

Jwa Chae Won

as [Saleswoman] (Ep. 5)

Bintang Tamu

Kim Yu Ri

as Kim Tae Gyeong (Ep. 5-6, 8)

Bintang Tamu

Kim Young Mi

as [Seongnang-gu Sign Language Center interpreter] (Ep. 5, 8-9, 12)

Bintang Tamu

Kim Geum Hui

as [Seongnang-gu Sign Language Center interpreter] (Ep. 5, 9, 12)

Bintang Tamu

Seo Eun Joo

as [Hiker] (Ep. 6)

Bintang Tamu

No Soo Sung

as [Hiker] (Ep. 6)

Bintang Tamu

Jin Sung Min

as [Paramedic] (Ep. 6)

Bintang Tamu

Park Hwa Hong

as [Paramedic] (Ep. 6)

Bintang Tamu

Kim Deok Ju

as [Nun] (Ep. 6, 8-9)

Bintang Tamu

Lee Ju Mi

as [Lobby patient] (Ep. 7)

Bintang Tamu

Choi Yo Woon

as [Lobby patient] (Ep. 7)

Bintang Tamu

Park Seon Ok

as [Lobby patient] (Ep. 7)

Bintang Tamu

Oh Seung Ah

as [Character in makjang drama] (Ep. 7)

Bintang Tamu

Seo Ye Bin

as (Ep. 7)

Bintang Tamu

Lee Doo Suk

as Kang Hyeong Cheol [Detective] (Ep. 7, 10-11)

Bintang Tamu

Hong Suk Youn

as [Delivery man] (Ep. 8)

Bintang Tamu

Jo Min Jae

as [PD] (Ep. 9)

Bintang Tamu

Park Da On

as Park Do Jae [Young] (Ep. 10)

Bintang Tamu

Lee Seung Joon

as [Judge] (Ep. 12)

Bintang Tamu

Heo Soo Bin

as [Waitress] (Ep. 12)

Bintang Tamu

Kim Doo Eun

as [Deliveryman] (Ep. 12)

Bintang Tamu

Jaspreet Kaur

as [Kidnapped woman] (Ep. 12)

Bintang Tamu

Kang Do Yoon

as [Soldier] (Ep. 12)

Bintang Tamu

Park Won Sang

as Na Jin Cheol [Hui Ju's biological father / Former club host] (Ep. 2-4, 9, 12]

Bintang Tamu

Kim Soo Jung

as [Government official's wife] (Ep. 3)

Bintang Tamu

Kim Seung Jun

as [President Office's interviewer] (Ep. 4)

Bintang Tamu

Ahn Chan Woong

as [Ui Yong's aide] (Ep. 7-9, 11-12)

Bintang Tamu

Noh Hyeong Woo

Composer

Park Sang Woo

Sutradara

Wi Deuk Gyu

Sutradara

Kwon Sung Chang

Executive Producer

Kim Ji Woon

Screenwriter