Actor lookalikes

could be Song Joong Ki's sister

could be Park Bo Young's brother

could be Ki Hyun Woo's sister

could be Kim You Jung's brother

could be Kim Ji Soo's brother

could be Jung Hae In's sister

could be Song Kang's sister

could be Han So Hee's brother

could be Jang Dong Yoon's brother

could be Lee Je Hoon's brother

could be Shin Sae Kyeong's sister

could be Lee Yun Hee's sister

could be Liu Dong Qin's brother

could be Choi Min Ho's brother

could be Choi Hyun  Wook's brother

could be Park Seo Joon's brother

could be Yoon Do Jin's brother

could be Yoon Shi Yoon's brother

could be Gong Chan's brother

could be Joshua Hong's brother

could be Lee Seung Hyub's brother

could be Park Seo Ham's brother

could be Kim Go Eun's sister

could be Jeon Yeo Been's sister

could be Nam Shi An's brother

could be Kim Young Dae's brother

could be Kim Yoon Hye's sister

could be Kim Tae Ri's sister

could be Shin Jae Ha's brother

could be Bae Hyeon Seong's brother

could be Key's brother

could be Kim Soo Hyun's brother

could be Ahn Bo Hyun's brother

could be Ro Woon's brother

could be Mark Lee's brother

could be Zhang Zhe Han's brother

could be Abe Alan's brother

could be Johnny's brother

could be Andy Bian's brother

could be Lee Sang Yi's brother

could be Jung Yoo Min's sister

could be Han Ji Eun's sister

could be Billy Patchanon's brother

could be Lay Zhang's brother

could be Lee Hak Joo's brother

could be Ahn Dong Goo's brother

could be Jo Hyuk Joon's brother

could be DK's brother 

could be Choi San's brother (you gotta have some imagination for this one T_T)

could be Lee Do Hyun's brother (again, with some imagination and without make-up)