Pemeran Bad Papa

Jang Hyuk (장혁)

as Yoo Ji Cheol

Pemeran Utama

Son Yeo Eun

as Choi Sun Joo

Pemeran Utama

Shin Eun Soo (신은수)

as Yoo Young Son

Pemeran Utama

Ha Jun (하준)

as Lee Min U

Pemeran Utama

Kim Jae Kyung (김재경)

as Cha Ji Woo

Pemeran Utama

Jang Eui Soo

as Sang Cheol [Martial art fighter]

Pemeran Pembantu

Kim Byung Chun

as Park Min Shik [Inspector of police investigation unit]

Pemeran Pembantu

Park Ji Bin

as Jung Chan Joong [CEO of Shingu Pharmaceutical]

Pemeran Pembantu

Lee Gyu Ho

as General Manager Park

Pemeran Pembantu

Kim Wook

as Lee Hyun Soo [Detective]

Pemeran Pembantu

Lee Joon Hyuk

as Kim Pil Doo [Chief of illegal gambling fighting ring]

Pemeran Pembantu

Shin Woo Gyum

as Kim Dae Sung [Researcher and PhD assistant]

Pemeran Pembantu

Choi Yoon Ra

as Choi Seon Yeong

Pemeran Pembantu

Kwon Dong Won

as Kang Sang Moon

Pemeran Pembantu

Kwak Jin Seok

as Jin Sang Goo

Pemeran Pembantu

An Jeong Gyun

as Jin Yeong Hoon

Pemeran Pembantu

Choi Ki Seob

Pemeran Pembantu

Ahn Da Eun

Pemeran Pembantu

David Lee

as Kim Yong Dae [Ji Cheol's coach]

Pemeran Pembantu

Lee Eun Saem

as Lee Seul Ki [Young Son's friend]

Pemeran Pembantu

Cho Yi Hyun (조이현)

as Kim Se Jung [Young Son's friend]

Pemeran Pembantu

Im Seon Woo

as Wang Hye Ji [Young Son's friend]

Pemeran Pembantu

Ji Yoon Ha

as Choi Sun Young [Sun Joo's sister]

Pemeran Pembantu

Kwon Eun Bin

as Kim Sang Ah [Young Son's rival]

Pemeran Pembantu

Jung Man Sik

as Ju Guk Seong [Ji Cheol's promoter]

Pemeran Pembantu

Yoon Bong Gil

as Park Ji Hoon [Min Woo's business partner]

Pemeran Pembantu

Joo Jin Mo

as Director Jang [Ji Chul's former promoter]

Pemeran Pembantu

Jung Ik Han

as Kim Jong Doo [Pil Doo's brother]

Pemeran Pembantu

Jung In Ki

as Cha Seung Ho [Ji Woo's father]]

Pemeran Pembantu

Jung Sung Ho

as [Boxing match commentator]

Bintang Tamu

Kim Si Eun

as Choi Sun Joo [Young]

Bintang Tamu

Hong In

as Yong Woo [Brain-tumour patient who took part in clinical trial]

Bintang Tamu

Kang Ji Woo

as Yoo Young Son [Young]

Bintang Tamu

Yu Je Geon

as Kim Yong Dae [Young]

Bintang Tamu

Mi Ram

as Han So Ra

Bintang Tamu

Lim Dong Yoon

as [Moneylender]

Bintang Tamu

Chun Myung Hoon

as [Himself]

Bintang Tamu

Jun Eun Mi

as [Restaurant boss]

Bintang Tamu

Jung Kang Hee

as [Photographer]

Bintang Tamu

Lee Heon Ju

as Mi Ok

Bintang Tamu

Jo Seung Yeon

as [Nurse]

Bintang Tamu

Yoon Seo Ah

as Wang Hye Ji

Bintang Tamu

Han Sang Chul

as [Bus driver]

Bintang Tamu

Han Ji Eun

as [Resident #2]

Bintang Tamu

Henny Savenije

as Freddie

Bintang Tamu

Baek In Kwon

as [Woodpecker] (Ep. 24)

Bintang Tamu

Yoon Young Min

as [Jury judge]

Bintang Tamu

Seo Yun Hyuk

as Jang Eun Hyuk

Bintang Tamu

Shim Hye Yun

as Yoo Young Son [Young]

Bintang Tamu

Lee Si Young

as [Bag store manager]

Bintang Tamu

Kang In Gi

Bintang Tamu

Kim Ro Sa

Bintang Tamu

Park Pal Young

Bintang Tamu

Woo Sang Jun

Bintang Tamu

Song Yoo Ha

Bintang Tamu

Choi Young

Bintang Tamu

Ok Joo Ri

Bintang Tamu

Chae Hyung Won

Bintang Tamu

Kim Hwan

Bintang Tamu

Park Chan Woo

Bintang Tamu

Ahn Dong Yeob

Bintang Tamu

Kim Seung Hyun

as Kim Yoon Soo [Ji Cheol's friend]

Bintang Tamu

Baek Eun Kyung

as [Sun Joo's colleague in departmental store]

Bintang Tamu

Jun Sung Won

as [Min Woo's 2nd coach]

Bintang Tamu

Park Yoon Young

as [Person asks for Young Son's autograph]

Bintang Tamu

Lee Shi Woo

as Joon Seo [Min Woo's younger brother]

Bintang Tamu

Oh Da Young

Asisten Sutradara

Jin Chang Gyu

Sutradara

Kim Sung Min

Screenwriter

Lee Sang Hoon

Bit part