Run On (2020)

Park Young Gyu
Ki Jung Do [Seon Gyeom's father]
Support Role
Cha Hwa Yun
Yook Ji Woo [Seon Gyeom's mother]
Support Role
Ryu Abel
Ki Eun Bi [Seon Gyeom's sister]
Support Role
Yeon Je Wook
Jung Ji Hyun [Dan Ah's assistant]
Support Role
Lee Bong Ryun
Park Mae Yi [Mi Joo's friend]
Support Role
Lee Jung Ha
Kim Woo Shik [Seon Gyeom's track team junior]
Support Role
Park Sung Joon
Kwon Young Il [Seon Gyeom's friend]
Support Role
Lee Hwang Ui
Seo Myung Pil [Dan Ah's father]
Support Role
Choi Jae Hyun
Seo Tae Woong [Dan Ah's step-brother]
Support Role
Lee Shin Ki
Seo Myung Min [Dan Ah's step-brother]
Support Role
Seo Jae Hee
Dong Kyung [Dann Agency's director]
Support Role
Kim Dong Young
Go Ye Joon [Young Hwa's friend]
Support Role
Kim Shi Eun
Go Ye Chan [Ye Joon's sister]
Support Role
Cha Bo Sung
Lucian [Tae Woong' band mate]
Support Role
Seo Jin Won
[Seon Gyeom's coach]
Support Role
Kim Shi Young
[Coffee shop owner]
Support Role

Bong Joon Ho
[Himself] (Ep. 1)
Guest Role
Kim Jung Ho
Hwang Guk Geon [Professor] (Ep. 1)
Guest Role
So Yun Ho
[Police officer] (Ep. 1)
Guest Role
Kim Ye Won
Choi Tae Ri [Actress] (Ep. 1-3, 16)
Guest Role
Park Sang Won
Park Gyu Deok [Seon Gyeom's track team junior] (Ep. 1-4, 6)
Guest Role
Na Ji Hoon
Kim Gi Beom [Seon Gyeom's track team junior] (Ep. 1-4, 6)
Guest Role
Kim Yong Ho
[Assistant coach] (Ep. 1-4, 6)
Guest Role
Bae Yoo Ram
Han Seok Won [Mi Joo's ex-boyfriend] (Ep. 1 & 16)
Guest Role
Ahn Jae Jun
[Athlete] (Ep. 2)
Guest Role
Kim Min Sang
[Tae Ri's manager](Ep. 2-3, 16)
Guest Role
Yoon Tae Hee
[Maid] (Ep. 3)
Guest Role
Kim Mi Hye
Yoo Ah In [Reporter] (Ep. 3-4)
Guest Role
Son Young Sun
Shin Ah Ryeon [Woo Shik's grandmother] (Ep. 3, 5, 10, 16)
Guest Role
Park Jung Eon
[Disciplinary judge] (Ep. 3 & 6)
Guest Role
Kim Do Young
[Disciplinary judge] (Ep. 3, 6)
Guest Role
Lee Jae Woo
[Disciplinary judge] (Ep. 3, 6)
Guest Role
Geum Hae Na
[Boxer] (Ep. 4)
Guest Role
Bret Allan Lindquist
Rob Stark [Reporter] (Ep. 4-5)
Guest Role
Lee Soo Bin
Lee Soo Bin [Track team girl] (Ep. 4, 7, 11, 13, 16)
Guest Role
Jung Myung Joon
[Priest] (Ep. 5)
Guest Role
Ok Joo Ri
[Church member] (Ep. 5)
Guest Role
Jo Yoo Jung
[Church member] (Ep. 5)
Guest Role
Shim Young Eun
Yoon Gong Ju [Mi Joo's college friend] (Ep. 5)
Guest Role
Lee Do Yup
No Geun Seong [Assemblyman] (Ep. 5-6, 12)
Guest Role
Park Joo Hee
Hui Jin [Producer] (Ep. 5, 7-9, 16)
Guest Role
Kim Na Young
Cho Hye Won [May's employee] (Ep 5, 7, 11)
Guest Role
Kim Kyung Ae
[Restaurant owner] (Ep. 5 & 11)
Guest Role
Seo Jung Yeon
Bang Bae Jeong [Track & Field coach] (Ep. 6-7)
Guest Role
Park Joo Yong
[Tae Woong's manager] (Ep. 7, 9-10, 13, 16)
Guest Role
Lee Won Hee
Quentin Park [Director] (Ep. 8)
Guest Role
Je Seung Hyun
[Hairstylist] (Ep. 8)
Guest Role
Lee Moo Nyoung
[Convenience store owner] (Ep. 8)
Guest Role
Park Gi Seon
[Doctor] (Ep. 8)
Guest Role
Garrison Michael Farquharson-Keener
[Cinematographer] (Ep. 8-9)
Guest Role
Kim Jae Hwa
Yeom Gang sun / "Julie Yeom" [Producer] (Ep. 8-9)
Guest Role
Kim Won Hae
[Bartender] (Ep. 8 & 16)
Guest Role
Park Jin Young
[May's employee] (Ep. 11)
Guest Role
Park Joon Sang
[Manger of Jieum Construction Track Team] (Ep. 13)
Guest Role
Kim Seon Ho
Kim Sang Ho [Film director] (Ep. 16)
Guest Role
Kim Young Joon
[Ji Woo's assistant]
Guest Role
Jung Soon Mi
[Pureun Keunsol School faculty]
Guest Role
Yang Yoon Hee
[Chang Seop's mother] (Ep. 13)
Guest Role
Ji Han Ah
[Soo Bin's aunt] (Ep. 13)
Guest Role
Park Joo Ha
[Grocery store crying girl] (Ep. 5)
Guest Role
Kang Choon Sung
[Photographer] (Ep. 3 - 4)
Guest Role
Kim Chae Won
[Team staff] (Ep. 14)
Guest Role
Ji Yun Seong
[James' boyfriend (ep.9)]
Guest Role
Kim Ki Ryung
[Jeweler] (Ep. 5)
Guest Role
Choi Min Kyu
[PE student] (Ep. 5)
Guest Role
Koo Do Kyun
[Shop owner] (Ep. 13)
Guest Role
Kim Soo Jung
[Myeong Pil's second wife] (Ep. 12)
Guest Role
Park Ji Won
[Pharmacist] (Ep. 13)
Guest Role
Kim Wang Yong
[Mayor] (Ep. 9)
Guest Role
Lee Chang Won Guest Role
Jung Min Joo
Min Ju
Guest Role
Kim In Kyung
[Staff] (Ep.1)
Guest Role