Song Joong Ki as Song Guk Hui
Lee Hee Joon as Jeon Su Yeong
Kwon Hae Hyo as Park Jang Su / “Sergeant Park”

Supporting Cast

Jo Hyun Chul as Jae Ung [Su Yeong’s Korea University club]
Juana del Río as Carla
Kim Tae Baek as Han Sang In
Kim Jong Soo as Song Geun Tae [Guk Hui’s father]
Park Ji Hwan as [Sergeant Park’s nephew]
Im Sung Jae as Bong Sik
Jung Jong Joon as Dr. Hong [Korean medicine clinic in Bogota]
Kim Ho Jung as [Guk Hui’s mother]