Pemeran Run On

Yim Si Wan (임시완)

as Ki Seon Gyeom

Pemeran Utama

Shin Sae Kyeong (신세경)

as Oh Mi Joo

Pemeran Utama

Choi Soo Young (최수영)

as Seo Dan Ah

Pemeran Utama

Kang Tae Oh (김윤환)

as Lee Young Hwa

Pemeran Utama

Kim Shi Young

as [Coffee shop owner]

Pemeran Pembantu

Bong Joon Ho

as [Himself] (Ep. 1)

Bintang Tamu

Kim Jung Ho

as Hwang Guk Geon [Professor] (Ep. 1)

Bintang Tamu

So Yun Ho

as [Police officer] (Ep. 1)

Bintang Tamu

Kim Ye Won

as Choi Tae Ri [Actress] (Ep. 1-3, 16)

Bintang Tamu

Kim Yong Ho

as [Assistant coach] (Ep. 1-4, 6)

Bintang Tamu

Ahn Jae Jun

as [Athlete] (Ep. 2)

Bintang Tamu

Yoon Tae Hee

as [Maid] (Ep. 3)

Bintang Tamu

Kim Mi Hye

as Yoo Ah In [Reporter] (Ep. 3-4)

Bintang Tamu

Park Jung Eon

as [Disciplinary judge] (Ep. 3 & 6)

Bintang Tamu

Kim Do Young

as [Disciplinary judge] (Ep. 3, 6)

Bintang Tamu

Lee Jae Woo

as [Disciplinary judge] (Ep. 3, 6)

Bintang Tamu

Geum Hae Na

as [Boxer] (Ep. 4)

Bintang Tamu

Bret Allan Lindquist

as Rob Stark [Reporter] (Ep. 4-5)

Bintang Tamu

Lee Soo Bin

as Lee Soo Bin [Track team girl] (Ep. 4, 7, 11, 13, 16)

Bintang Tamu

Jung Myung Joon

as [Priest] (Ep. 5)

Bintang Tamu

Ok Joo Ri

as [Church member] (Ep. 5)

Bintang Tamu

Jo Yoo Jung

as [Church member] (Ep. 5)

Bintang Tamu

Lee Do Yeop

as No Geun Seong [Assemblyman] (Ep. 5-6, 12)

Bintang Tamu

Park Joo Hee

as Hui Jin [Producer] (Ep. 5, 7-9, 16)

Bintang Tamu

Kim Kyung Ae

as [Restaurant owner] (Ep. 5 & 11)

Bintang Tamu

Seo Jung Yeon

as Bang Bae Jeong [Track & Field coach] (Ep. 6-7)

Bintang Tamu

Lee Won Hee

as Quentin Park [Director] (Ep. 8)

Bintang Tamu

Je Seung Hyun

as [Hairstylist] (Ep. 8)

Bintang Tamu

Lee Moo Nyoung

as [Convenience store owner] (Ep. 8)

Bintang Tamu

Park Gi Seon

as [Doctor] (Ep. 8)

Bintang Tamu

Garrison Michael Farquharson-Keener

as [Cinematographer] (Ep. 8-9)

Bintang Tamu

Kim Jae Hwa

as Yeom Gang sun / "Julie Yeom" [Producer] (Ep. 8-9)

Bintang Tamu

Kim Won Hae

as [Bartender] (Ep. 8, 16)

Bintang Tamu

Park Joon Sang

as [Manager of Jieum Construction Track Team] (Ep. 13)

Bintang Tamu

Kim Seon Ho (김선호)

as Kim Sang Ho [Film director] (Ep. 16)

Bintang Tamu

Kim In Kyung

as [Staff] (Ep.1)

Bintang Tamu

Jung Min Joo

as Min Ju

Bintang Tamu

Kim Chae Won

as [Team staff] (Ep. 14)

Bintang Tamu

Koo Do Kyun

as [Shop owner] (Ep. 13)

Bintang Tamu

Lee Chang Won

Bintang Tamu

Jung Soon Mi

as [Pureun Keunsol School faculty]

Bintang Tamu

Kang Choon Sung

as [Photographer] (Ep. 3 - 4)

Bintang Tamu

Choi Min Kyu

as [PE student] (Ep. 5)

Bintang Tamu

Kim Wang Yong

as [Mayor] (Ep. 9)

Bintang Tamu

Kim Ki Ryung

as [Jeweler] (Ep. 5)

Bintang Tamu

Park Ji Won

as [Pharmacist] (Ep. 13)

Bintang Tamu

Park Joo Ha

as [Grocery store crying girl] (Ep. 5)

Bintang Tamu

Kim Sang Ho

Asisten Sutradara

Lee Jae Hoon

Sutradara

Park Si Hyeon

Screenwriter