Koo Hye Sun as Geum Jan Di

F4

Lee Min Ho as Goo Joon Pyo
– Jung Chan Woo as Joon Pyo (young)
– Kang Han Byul as Joon Pyo (child)
Kim Hyun Joong as Yoon Ji Hoo
– Nam Da Reum as child Ji Hoo
Kim Bum as So Yi Jung
– Jung Tae Ho as Yi Jung (child)
Kim Joon as Song Woo Bin

Extended Cast

Kim So Eun as Chu Ga Eul (Jan Di’s best friend)
Kim Hyun Joo as Goo Joon Hee (Joon Pyo’s elder sister)
Lee Hye Young as Kang Hee Soo (Joon Pyo’s mother)
Ahn Suk Hwan as Geum Il Bong (Jan Di’s father)
Im Ye Jin as Na Gong Joo (Jan Di’s mother)
Park Ji Bin as Geum Kang San (Jan Di’s younger brother)
Han Chae Young as Min Seo Hyun (F4’s best friend/Ji Hoo’s ex girl friend)
Lee Min Jung as Ha Jae Kyung (JK Group’s CEO’s daughter and Jun Pyo’s fiancee)
Lee Jung Gil as Yoon Seok Young (Ji Hoo’s grandfather)
Jung Ho Bin as Jung Sang Rok (Kang Hee Soo’s Chief Secretary)
Lee Si Young as Oh Min Ji
Gook Ji Yun as Choi Jin Hee / Ginger
Jang Ja Yun as Park Sun Ja / Sunny
Min Young Won as Lee Mi Sook / Miranda
Kim Ki Bang as Bom Chun Sik (Jan Di and Ga Eul’s boss)
Song Suk Ho as Butler Lee
Kim Young Ok as Head Maid
Im Ju Hwan as So Yi Hyun (Yi Jung’s older brother)
Park Soo Jin as Cha Eun Jae (Yi Jung’s first love)
Kim Min Ji as Jang Yoo Mi
Kim Jong Jin as So Hyun Sub (Yi Jung’s father)
Jung Ui Chul as Lee Min Ha / Min Jae Ha (fashion model)