Pemeran In Your Radiant Season

Lee Sung Kyung (이성경)

as Song Ha Ran

Pemeran Utama

Chae Jong Hyeop (채종협)

as Sunwoo Chan

Pemeran Utama

Lee Mi Sook

as Kim Na Na / Kim Na Bong

Pemeran Pembantu

Han Ji Hyeon

as Song Ha Yeong

Pemeran Pembantu

Oh Ye Ju

as Song Ha Dam

Pemeran Pembantu

Kang Suk Woo

as Park Man Jae

Pemeran Pembantu

Kwon Hyuk

as Yeon Tae Seok

Pemeran Pembantu

Kim Tae Young

as Cha Yu Gyeom

Pemeran Pembantu

Ki Hyun Woo (기현우)

as Baek Seung Gyu [Nana Atelier's design team 1 junior designer]

Pemeran Pembantu

Lee Seung Yeon

as Jeon Pu Reum [Nana Atelier's design team 1 assistant designer]

Pemeran Pembantu

Yun Chae Bin

as Kim Sol [Nana Atelier's design team 1 Intern]

Pemeran Pembantu

Jang Yong Won

as Jeremy [Nana Atelier's design team 1 senior designer]

Pemeran Pembantu

Kim Hyun Woo

as Baek Seung Gyu [Nana Atelier design team 1 junior designer]

Pemeran Pembantu

Firas Naji

as Ben [Chan's American animation studio colleague]

Pemeran Pembantu

Jung Hae Kyun

as Seon U Seok [Chan's father]

Pemeran Pembantu

Kang Ae Sim

as Kim Seon [Chan's maternal grandmother]

Pemeran Pembantu

Kwon Do Hyung

as Kang Hyeok Chan [Ha Ran's ex-boyfriend]

Pemeran Pembantu

Lee Ju Yeon

as Cha Su Jin

Pemeran Pembantu

Go Hae Won

as Song Ha Ran [Teen] (Ep. 1, 3, 6-7)

Bintang Tamu

Woo Do Im

as Yu Jeong (Ep. 2)

Bintang Tamu

Kang Hee Man

as [Detective] (Ep. 2)

Bintang Tamu

Lee Hyeon Seo

as [Past employee] (Ep. 2)

Bintang Tamu

Kim Jung Ho

as Dr. Nam Gong Jin (Ep. 2, 4, 9)

Bintang Tamu

Kang Hye Rin

as Song Ha Dam [Child] (Ep. 2, 7)

Bintang Tamu

Hong Ye Ji

as [Doctor] (Ep. 3)

Bintang Tamu

Jung Min Joon

as Sunwoo Chan [Child] (Ep. 3-4)

Bintang Tamu

Kang Hyun Oh

as Cha Min (Ep. 3-4)

Bintang Tamu

Kim Young Joon

as Song Chung Ho [Ha Ran's father] (Ep. 3, 7)

Bintang Tamu

Ha Ji Eun

as Min Hye Won [Ha Ran's mother] (Ep. 3, 7)

Bintang Tamu

Yoon Seo Yeon

as Song Ha Yeong [Teen] (Ep. 3, 5-7, 9, 11)

Bintang Tamu

Yoon Ha Young

as Han So Ra (Ep. 4)

Bintang Tamu

Jeon Chi Hwa

as [Mechanic] (Ep. 4)

Bintang Tamu

Byeon Chang Yeol

as [Taxi driver] (Ep. 4)

Bintang Tamu

Do Jung Won

as [Secretary in the past] (Ep. 5)

Bintang Tamu

Han Chae Bin

as [Fabric employee] (Ep. 6)

Bintang Tamu

Han Jae Hun

as [Engineering teaching assistant] (Ep. 8)

Bintang Tamu

Ma Jung Pil

as [Doctor] (Ep. 8)

Bintang Tamu

Kim Jae Ho

as [Photo man] (Ep. 8)

Bintang Tamu

Jung Hyeong Ryeol

as Chae Hyeon U (Ep. 8-9)

Bintang Tamu

Kim Hong Pyo

as [Yu Gyeom’s dad] (Ep. 8-9)

Bintang Tamu

Jin Mi Sa

as [Yu Gyeom’s mom] (Ep. 8-9)

Bintang Tamu

Jung Sang Hee

Sutradara

Kim Yeong Jae

Sutradara

Park Sang Hyun

Producer

Jo Sung Hee

Screenwriter

Yoon Bak (윤박)

as Photographer Yun (Ep. 1, 6)

Cameo

Han Jae Yi

as Kang Eun Chan [Chan's sister] (Ep. 1, 8, 11-12)

Cameo