Song Hye-kyo as Sister Yunia

Jeon Yeo-been as Sister Michaela

Lee Jin-uk as Father Paul

Moon Woo-jin as Hee-jun

Huh Joon-ho as Father Andrea

Kim Kuk-hee as Hyo-won

Shin Jae-hwi as Ae-dong

Gang Dong-won as Deacon Choi

Han Dong-hee as Nurse

Park Jeong-hak as Dam-eon

Jeon Su-ji as Hee-jun's Mother

Park Ji-il as Bishop

Jeon Yu-na as Young Michaela

Choi Yu-ri as Young Michaela's Roommate

Oh Man-seok as Professor

Massimo Fierro as Rosicrucianism Priest

Adriana Maria Duello as Interpreter Nun

Lee Kyung-seong as Patient

Yoon Jin-seong as Park Myeong-ja

Shin Joo-hyup as Marco

Lee Myung-ha as Michaela's Mother

Park Yong as Congressman

Hong Sung-duk as Father

Jang Ui-don as Father

Kim Bi-bi as Doctor

Lee Se-rang as Shaman