Song Hye-kyo as Mi-ra

Gang Dong-won as Dae-soo

Jo Sung-mok as Ah-reum

Baek Il-seob as Mr. Jang

Heo Joon-seok as Seung-chan

Kim So-jin as Writer Kim

Cha Eun-woo as Ah-reum

Chae Seo-jin as Lee Seo-ha

Lee Sung-min as Ah-reum's Doctor

Kim Kap-soo as Dae-soo's Father

Choi Yoon-seok as Aspiring to be Director

Hwang Seok-jeong as Praying Woman

Lee Sae-ro-mi as Praying Woman

Chae Yoon-hee as Praying Woman

Han Seung-hyun as Dae-soo's Junior

Yang Seung-geol as Mi-ra's Father

Ahn Hyeon-jeong as Mi-ra's Mother

Taeyeon as Self

Tiffany Young as Self

Seohyun as Self

Lee Yun-u as Bad Girl

Kang Suk-won as Taekwondo Team Coach

Son Cheol-min as Husband

Choi Seo-yeon as Taxi Woman