Main •
Jeong Yu-mi as Ha Do-na :An assistant director who is passionate and enthusiastic about her work to the point of being nicknamed "Lunatic". She is still waiting for the day when she can become a full-fledged director. •
Hyun Woo as Kim Bum-woo :An actor who has been in the industry for seven years but has yet to catch his big break as his anxiety in front of cameras hinders his acting during the final cut. He has mostly been cast in nameless or bit-part roles and works several other part-time jobs on the side. He falls in love with Do-na after meeting her when she was assigned to help him overcome his anxiety. •
Kang Ji-sub as Seol Do-hyun :A famous actor whom Do-na was assigned to as a production assistant. He notices Do-na and develops feelings for her. •
Do Ji-won as Song Mi-ja/Rara :Young-woong's wife and a former actress. She now lives the high life as the wife of a
chaebol but has been hiding a painful secret. •
Park Sang-min as Jung Young-woong :Chairman of Juvis (JU) Group and husband of Song Mi-ja •
Yeon Jung-hoon as Shin Dong-woo :A television director well known for being a workaholic. He only focuses on his work and does not believe in forming friendships, often being extremely curt with his staff.
Supporting JU Group • Park Seon-im as Jung Hye-mi •
Hyun Jyu-ni as Jung Sung-ah, daughter of Chairman Jung and Song Mi-ja who eschews her life as an heiress and would rather become a singer
JT Group •
Dokgo Young-jae as Kim Ho-tae •
Kim Hye-sun as Choi Min-kyung • Kang Sung-min as Kim Joon-ho •
Jiyul as Kim Seo-hyun
People in SBC Drama company • Shin Joo-ah as Kang Ha-young • Jeon Se-hyun as Kang Ha-kyung • Kim Joon-hyun as Yoo Gil-joon •
Kim Kiri as Chul-seon • Joo Sung-hwan as Drama Department Head
People around Do-na •
Ban Hyo-jung as Park Sun-jin •
Ha Jae-sook as Lee Young-hee
People around Dong-woo • Park Hyun-sook as Shin Hwa-im, a veteran actress and Dong-woo's paternal aunt
People around Do-hyun •
Kwon Oh-joong as Kim Oh-book • Kim Noo-ri as Man-soo == Ratings ==