Song Hye-kyo as Sister Giunia

Jeon Yeo-been as Sister Michela

Lee Jin-uk as Father Paolo

Moon Woo-jin as Choi Hee-Joon

Huh Joon-ho as Father Andreas

Kim Guk-hee as Hyo-won

Shin Jae-hwi as Ae-dong

Gang Dong-won as Choi Joon-ho

Han Dong-hee as Nurse

Park Jeong-hak as Dam-eon

Jeon Su-ji as Hee-joon's Mother

Park Ji-il as Bishop

Jeon Yu-na as Young Michela

Choi Yu-ri as Young Michela's Roommate

Oh Man-seok as Professor Sin

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 Michela'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