Tang Wei as Bai Li

Suzy as Koo Jeong-in

Park Bo-gum as Park Tae-ju

Jung Yu-mi as Seo Hae-ri

Choi Woo-shik as Kim Hyun-soo

Gong Yoo as Sung-jun

Tang Joon-sang as Choi Jin-gu

Seong Byeong-suk as Song Jeong-ran

Choi Moo-seong as Lee Yong-sik

Lee Eol as Hae-ri's Father

Kang Ae-sim as Hae-ri's Mother

Kim Sung-ryung as Gil-soon

Park Hee-von as Stella

Anupam Tripathi as Hanan

Darcy Paquet as Danny

Jang Yoon-jung as Yong-sik's Wife

Song Duk-ho as Yong-sik's Son

Jang Sung-yoon as Yong-sik's Daughter

Nina Paw Hei-Ching as Hwa-ran

Park Yeon-woo as Male Employee at the Airport

Min Ji-a as Tae-ju's Doctor

Kang Jin-ah as Investigative Detective

Kim Geu-lim as Hae-ri's Colleague

Park Mi-hyeon as Hyun-mi

Jo Hee-bong as Tae-ju's Senior on the Subway

Jeon Su-ji as Jeong-in's Colleague on the Subway

Jeon Woon-jong as Senior Purser

Jeong Seong-in as Jeong-in's Colleague

Son Kyoung-won as Taxi Driver

Lee Nam-gyeong as Young Hae-ri

Moon Jung-woong as Rehabilitation Therapist