Who Joon

Lee Geun-young

JJ / Choi Jae-joon

Oh In-hyung

Go Soo-hwan

Mi-Jung

Seo Ji-hyang

Han Jae-won

Noh Do-yoon

Bae Young-seok

reporter

Ra-ra

Gang-yeon

Assistant Producer

Shin-hyuk

Jang Hwa-jeong

Choi Hee-geon

Kang Ji-hyuk

Oh In-hyung’s Manager

Cha Yu-ri

Lee Joo-il

Spigen Employee

Roy Ahn

Who Joon’s Music Producer

JJ's Brother

Jo Hae-yoon

JJ's Investigator

Cha Moon-hee

Choi Hwa-Jin

Choi Hwa-Jin's Colleague

Spigen Receptionist

Kim Eun-chae

Kang Gyeong-soo

Attorney Meeting JJ

Abductor

Director Song

TV Host

Music Producer Editing New Song

Reporter

Older Who Joon Fan

Award Ceremony Announcer

Benedict

Flight Stewardess That Helps Who Joon

Director of the Commercial

Reporter

Director Lee

Chief Producer of the Reality Show

Flight Attendant Who Asks for Autograph

Older Female Airline Passenger

Sauna Woman

Young Who Joon

Who Joon’s Dad’s Friend

Pharmacist

Janitor

Girl at Cafe

Director Meeting with In-hyung

Kim Dahyeon

Audition Judge

Reporter

Shooting Star Employee

Wonder Women Executive

Kim Young-Mi

Guy Waiting in Line with Friend (Denim Jacket)

Lee Joo-Il's friend

Lee Joo-Il's Friend

ER Nurse

First Reporter at Hospital

Doctor

Movie Producer