Main •
Lee Sung-kyung as Oh Han-byul : Head of the public relations department of Star Force Entertainment. She is a person with extraordinary eloquence and excellent crisis response ability. She is also in charge of various departments such as public relations, crisis response, and communication, and dominates the industry. Oh Han-byul and Gong Tae-sung were university mates. •
Kim Young-dae as Gong Tae-sung : A top star actor who is signed with Star Force Entertainment. He is loved by the public for his bright, angelic smile with a polite and upright image. However, unknown to the public, he harbors a scarred past. Gong Tae-sung and Oh Han-byul were university mates. •
Yoon Jong-hoon as Kang Yu-sung : A manager with good looks and good manners who is often mistaken for a celebrity. •
Kim Yoon-hye as Park Ho-young : A former Taekwondo player turned manager. •
Lee Jung-shin as Do Soo-hyuk : An entertainment lawyer and the consultant of Star Force Entertainment. •
Park So-jin as Jo Ki-bum : Oh Han-byul's close friend and entertainment reporter.
Supporting Star Force Entertainment •
Ha Do-kwon as Choi Ji-hoon : Director of Star Force Entertainment. •
Jang Hee-ryung as Baek Da-hye : An actress under the Star Force Entertainment, a fan of Gong Tae-sung. She stars in the drama 'The World of Stars' as the female lead, alongside Tae-sung. • Lee Han-ik as Kang Min-gyu : He was Tae-sung's new manager. Being unable to deal with Tae-sung's personality, he quit his job at Star Force and later joined DS actors. •
Jin Ho-eun as Byun Jeong-yeol : A new manager under Star Force Entertainment. He becomes Tae-sung's new manager after Kang Min-kyu and protects Tae-sung with respect and pride to work with him. • Shin Hyun-seung as Yoon Jae-hyun : A rookie actor under Star Force. He plays a supporting role in the drama 'The World of Stars'. •
Kwon Han-sol as Hong Bo-in : The youngest member of Star Force Entertainment's PR team. A new employee full of stupid mistakes. •
Yoon Sang-jeong as Chae Eun-soo : PR team member of Star Force Entertainment. • Im Sung-kyun as Lee Yoon-woo : An actor under Star Force Entertainment who has been close friends with Tae-sung since he was a trainee. • Jang Do-ha as Jang Seok-woo : An actor under Star Force Entertainment. He is a troublemaker who caused many dating rumors.
DS Actors •
Kim Dae-gon as Han Dae-soo : CEO of DS Actors agency who was a manager at Star Force Entertainment. •
Lee Si-woo as Jin Yu-na : A rookie actress under DS Actors. She plays a supporting role in the drama
The World of Stars. • Kang Jun-gyu as Shim Jin-woo : An actor under DS Actors who moved from Star Force to DS with Dae-soo.
Others •
Lee Seung-hyub as Kang Si-deok : The owner of Sidokine, a famous soup restaurant in Daegu. He later becomes a rookie actor under Star Force after Park Ho-young convinced him and adopts stage name Kang Yu-sung. •
Choi Ji-woo as Eun Si-woo / Kim Bok-soon : A legendary actress representing the 90s, later revealed to be Gong Tae-sung's biological mother. •
So Hee-jung as Kwon Myung-hee : Gong Tae-sung's housemaid who takes care of him with a warm and friendly personality, but harbours a different intention within her. • Heo Gyu as Yuki : The owner of Organic Bar, Hanbyul, Kibeom, and Hoyoung's hideout. More than anyone else, he is quick to hear about the entertainment industry. • Yoo Gun-woo as Director Park Han-suk :The director of the drama 'The World of Stars' starring Tae Sung and Da Hye. • Lee Joo-won as Yang Young-gi : The director of OnStylebo where Jo Ki-bum works. • Yoon Young-min as Lee Hae-min : Veteran secretary of Su Hyuk's law firm Biho.
Special appearance •
Park Jeong-min as Park Jo-eun, Oh Han-byul's blind date partner (Ep. 1) • Yoon Byung-hee as Secretary of the Overseas Volunteer Group (Ep. 1) •
Seo Yi-sook as an actress under Star Force Entertainment (Ep. 1) •
Kim Seul-gi as Happy, a rookie singer (Ep. 2) •
Lee Ki-woo as Ahn Jun-ho, an actor under Star Force Entertainment (Ep. 3) •
Lee Sang-woo Han Seung-Il, a famous actor newly signed with Star Force (Ep. 4) •
Moon Ga-young as Yeo Ha-jin, an actress who was rumoured to be dating Gong Tae-sung in the past (Ep. 6, 8) •
Song Ji-hyo as Song Ji-hee, an actress (Ep. 7) •
Kim Dong-wook as Lee Jung-hoon (Ep. 8) •
Lee Sang-yeob as Do Ji-hyuk, an attorney and Do Soo-hyuk's elder brother (Ep.11) •
Um Ki-joon as Yoon Jang-seok, an actor (Ep. 13) •
Bong Tae-gyu as Sung Woo-ju, CEO of Yoon Jang-seok's agency (Ep. 13) ==Production==