•
Yoon Eun-hye as Kang Hye-na :She is the owner of Lady Castle, and lost her parents in a plane crash. Even then, she lived a princess-like life with her servants but she had a lonely upbringing, living under the care of her stern grandfather. This resulted to her overtly indifferent and oblivious-to-others character. She has grown-up into a self-centered woman that every time she opens her mouth, she would blurt out blunt remarks no matter who the person is. She's skilled in horse riding, fencing, and clay shooting; the only reason is to either humiliate men unworthy of her, or to add awkwardness to conversations. One day, she came across Seo Dong-chan, a gigolo who turns her life upside down. She feels uneasy over the fact that she may have finally met her match. •
Yoon Sang-hyun as Seo Dong-chan :A former gigolo who gave up his schooling in the university and his first love just to make money for the operation of his mother who has
leukemia. Dong-chan has good looks, eloquent speech, and can easily adapt to circumstances, thus making him the best gigolo. Soon after his mother died, he stopped his booming career. At the moment, he's paying off a five thousand debt from the charges from his mother's operations. One day, a woman named Kang Hye-na who is notorious for being arrogant and spoiled shows up and stimulated his competitive spirit. Dong-chan makes up his mind to enter the Castle and becomes her butler, thereby changing his whole life. •
Jung Il-woo as Lee Tae-yoon :An elite lawyer who came from a very wealthy family. He is devoting his life to legal service for the poor in a shabby lawyer's office. He may look like a soft and gentle young man, but when it comes to his work he is merciless and sharp like a knife. He reminds Hye-na of her first love which is why she was attracted to him. •
Moon Chae-won as Yeo Eui-joo :A bright and cheerful girl who dreams of becoming a shoe designer. She grew up with Dong-chan and is close to him. She constantly encourages him to take the right path, worrying about him and supporting him to get his life back on track. Behind Eui-joo's concern, is her unrequited love for Dong-chan. • Wang Seok-hyeon as Kang Su-min •
Kim Young-kwang as Jung Woo-sung •
Lee Jung-gil as Chairman Kang • Kim Myeong-gook as Representative Kang :Hye-na's uncle (her father's younger brother), and managing director of Kang-San Group. He schemes to make the company his own. • Jo Hyun-kyu as Jang Dong-gun • Shin Ki-hyun as Lee Byung-hun •
Song Joong-ki as butler (cameo) == Original soundtrack ==