Main Cast
- Jun Ji Hyun as Chun Song Yi (28, top actress/university student)
- Kim Hyun Soo as young Chun Song Yi
- Kim Soo Hyun as Do Min Joon (alien/university professor)
- Park Hae Jin as Lee Hwi Kyung (28, youngest son of S&C Group)
- Jo Seung Hyun (조승현) as young Hwi Kyung
- Yoo In Na as Yoo Se Mi (28, supporting actress)
- Na Young Hee as Yang Mi Yun (54, Song Yi's mother)
- Uhm Hyo Sup as Chun Min Goo (56, Song Yi's father)
- Ahn Jae Hyun (안재현) as Chun Yoon Jae (18, Song Yi's younger brother)
- Hong Jin Kyung (홍진경) as President Hong (Manhwabang owner)
- Kim Chang Wan as Jang Young Mok (62, lawyer)
- Shin Sung Rok as Lee Jae Kyung (36, heir of S&C Group)
- Lee Jung Gil as Lee Bum Joong (67, chairman of S&C Group)
- Lee Il Hwa as Han Sun Young (49)
- Oh Sang Jin (오상진) as Yoo Suk (31, prosecutor/Yoo Se Mi's older brother)
- Yoo In Young as Han Yoo Ra (top actress/Song Yi's rival)
- Jo Hee Bong
Download Link : You Who Came From The Stars Episode 3
English Subtitle : Download Here