Shin Sung Rok
Lee Jae Kyung [Hee Kyung's brother]
Bijrol
Kim Chang Wan
Jang Young Mok [Min Joon's friend]
Bijrol
Na Young Hee
Yang Mi Yeon [Song Yi's mother]
Bijrol
Ahn Jae Hyun
Cheon Yoon Jae [Song Yi's younger brother]
Bijrol
Uhm Hyo Sub
Cheon Min Goo [Song Yi's father]
Bijrol
Oh Sang Jin
Prosecutor Yoo Suk [Se Mi's older brother]
Bijrol
Kim Hee Won
Detective Park Byung Hee
Bijrol
Kim Kang Hyun
Yoon Bum [Song Yi's manager]
Bijrol
Kim Bo Mi
Min Ah [Song Yi's stylist]
Bijrol
Jo Hee Bong
President Ahn Dong Min [CEO of Song Yi's management agency]
Bijrol
Hong Jin Kyung
Hong Hye In / Hong Bok Ja [Song Yi's high school classmate]
Bijrol
Lee Jung Gil
Lee Bum Joong [Hee Kyung's father]
Bijrol
Sung Byung Sook
Hong Eun Ah [Hee Kyung's mother]
Bijrol
Lee Il Hwa
Han Sun Yeong [Se Mi's mother]
Bijrol
Lee Yi Kyung
Lee Shin [Jae Kyung's secretary]
Bijrol
Kim Hyun Soo
Cheon Song Yi [Young] / Seo Yi Hwa
Bijrol
Yoo In Young
Han Yoo Ra
Bijrol
Jo Seung Hyun
Lee Hee Kyung [Young]
Bijrol
Jo Se Ho
Cheol Soo
Bijrol
Nam Chang Hee
Hyuk
Bijrol
Han Eun Sun
[Song Yi's makeup artist]
Bijrol

Jung Ji Soon
Manager Moon [Se Mi's manager] (Ep. 1, 4)
Gastrol
Chuk Jae Hee
[Min Joon's colleague] (Ep. 1, 4, 9)
Gastrol
Choi Dae Sung
[Min Jun's colleague] (Ep. 1, 4, 9)
Gastrol
Jang Sung Bum
[Production crew] (Ep. 1, 5-7)
Gastrol
Yoo Joon Sang
Section Chief Yoo (Ep. 2-3)
Gastrol
Serri
[Junior actress] (Ep. 3)
Gastrol
Yoo Jang Young
[Doctor] (Ep. 3)
Gastrol
Kim Hye Won
Yoo Se Mi [Young] (Ep. 3, 6, 8)
Gastrol
Park Jung Ah
Noh Seo Yeong [Bride] (Ep. 4)
Gastrol
Jang Hang Joon
Park Min Kyu [Director] (Ep. 4)
Gastrol
Son Eun Seo
Hwang Jin Yi [Gisaeng] (Ep. 4)
Gastrol
Lee Geum Ju
[Yi Hwa's mother] (Ep. 4-5)
Gastrol
Jin Hyun Kwang
Kim Hyuk Soo [Daehan Daily Reporter] (Ep. 4-6)
Gastrol
Choi Min
[Detective] (Ep. 5)
Gastrol
Kim Soo Ro
Lee Hyung Wook (Ep. 5)
Gastrol
Han Seo Yeon
Han Yoo Seon [Yoo Ra's sister] (Ep. 5, 10)
Gastrol
Kim Hyo Myung
[Gas station guy] (Ep. 6)
Gastrol
Choi Woong
[Han Yoo Ra's fan] (Ep. 7)
Gastrol
Kim Tae Young
[Song Yi's doctor] (Ep. 8)
Gastrol
Kim Yoon Tae
[Interrogation Detective] (Ep. 7-8)
Gastrol
Kim Hae In
Yang Min Joo [Jae Kyung's ex-wife] (Ep. 7, 17-19)
Gastrol
Jeon Jin Seo
Cheon Yoon Jae [Young] (Ep. 9)
Gastrol
Park Young Gyu
[Doctor in Joeson era] (Ep. 11)
Gastrol
Jung Eun Pyo
Yoon Sung Dong [Joseon realtor](Ep.6) / Yoon Sung Dong's descendant [Realtor] (Ep. 12)
Gastrol
Lee Ja Min
[Nurse in mental hospital] (Ep. 14, 17)
Gastrol
Bae Suzy
Go Hye Mi [Min Joon's student] (Ep. 17)
Gastrol
Yeon Woo Jin
Lee Han Kyung [Hee Kyung's eldest brother] (Ep. 18)
Gastrol
Ryu Seung Ryong
Heo Gyun [Joseon poet] (Ep. 19)
Gastrol
Yang Joo Ho
Wang Jae Soo (Ep. 20)
Gastrol
Sandara Park
[Actress] (Ep. 21)
Gastrol
Kim Won Joon
[Actor] (Ep. 21)
Gastrol
Jo Woo Jin
Heo Jun's assistant [Joseon era]
Gastrol
Kim Kyul
[Doctor of emergency room]
Gastrol
Song Tao
Zhang Ti Wei
Gastrol
Jung Myung Joon
[Laments about getting old]
Gastrol
Yoon Chae Eun
Ye Dam
Gastrol
Kim Sung Ho
[Cinematographer]
Gastrol
Jo Seung Yun
Kim Geun Su [Assistant prosecutor general] (Ep. 16)
Gastrol
Choi Hyo Eun
Hyo Na
Gastrol
Ji Sang Hyeok Gastrol