Gianna Jun

Shim Cheong / Se-hwa

전지현

Lee Min-ho

Heo Joon-jae / Kim Dam-ryung

이민호

이희준

Jo Nam-doo / Park Moo

Shin Won-ho

Tae-oh

Shin Rin-a

Seo Yoo-na

Shin Hye-sun

Cha Shi-ah

신혜선

Moon So-ri

Ahn Jin-joo

문소리

Na Young-hee

Mo Yoo-ran

나영희

황신혜

Kang Seo-hee/Kang Ji-yeon

오연아

Young Kang Seo-hee/Kang Ji-yeon/Hong Nan

이지훈

Heo Chi-hyun

Park Hae-soo

Hong Dong-pyo

박해수

Sung Dong-il

Ma Dae-young / Yang Seung-gil

성동일

Choi Jung-woo

Heo Il-joong

최정우

Jinyoung

Young Heo Joon-jae/Kim Dam-ryeong

진영

홍진경

Shim Cheong's Homeless Friend

박지일

Manager Nam

Lee Jae-won

Cha Dong-shik

심이영

Young Moo Yoo-ran

신은수

Young Se-hwa

김성령

Jang Jin-ok

조정석

Yoo Jong-hoon

최권

Young Manager Nam

갈소원

Child Se-hwa

전진서

Child Heo Joon-jae/Kim Dam-ryeong

이호재

Professor Jin Kyung-won/Fortune Teller

서동원

Aquarium Manager

정수정

Flight Attendant

Kim Hye-yoon

Jang Jin-ok's Daughter

Sung Chang-hoon

Mr. Yang's Subordinate

Ko Kyu-phil

Bodyguard

고규필

Ahn Jae-hong

Missionary Thomas

안재홍

Park Jin-joo

Nurse

박진주

정유미

Kim Hee-jin

Kim Seul-gi

Mermaid

김슬기

Carson Allen

Mermaid