Pemeran The Legend of the Blue Sea

Jun Ji Hyun (전지현)

as Sim Cheong / Se Hwa

Pemeran Utama

Lee Min Ho (이민호)

as Heo Joon Jae / Kim Dam Ryung

Pemeran Utama

Lee Hee Jun (이희준)

as Cho Nam Du

Pemeran Pembantu

Shin Won Ho

as Tae Oh

Pemeran Pembantu

Park Ji Il

as Manager Nam

Pemeran Pembantu

Shin Hae Sun (신혜선)

as Cha Shi A

Pemeran Pembantu

Moon So Ri (문소리)

as Ahn Jin Joo

Pemeran Pembantu

Lee Ji Hoon (이지훈)

as Heo Chi Hyeon

Pemeran Pembantu

Park Hae Soo

as Hong Dong Pyo

Pemeran Pembantu

Hwang Shin Hye

as Kang Seo Hee

Pemeran Pembantu

Sung Dong Il

as Ma Dae Yeong / Mister Yang

Pemeran Pembantu

Na Young Hee

as Mo Yoo Ran

Pemeran Pembantu

Park Jin Young (박진영)

as Heo Joon Jae [Young]

Pemeran Pembantu

Shin Eun Soo (신은수)

as Se Hwa / Shim Chung [Young] (Ep. 3, 4 ,13)

Pemeran Pembantu

Jeon Jin Seo

as Heo Joon Jae [Child]

Pemeran Pembantu

Gal So Won

as Shim Chung [Child]

Pemeran Pembantu

Choi Jung Woo

as Heo Il Joong

Pemeran Pembantu

Shin Rin Ah

as Seo Yoon Ah

Pemeran Pembantu

Sim Yi Young

as Moo Yoo Ran [Young]

Pemeran Pembantu

Jung Moon Sung

as Heo Gil Joong [Young]

Pemeran Pembantu

Kim Jae Il

as Yoo Shi Joon [Prosecutor]

Pemeran Pembantu

Lee Ho Jae

as Psychologist Jin Kyung-Won / Fortune Teller [Past]

Pemeran Pembantu

Krystal Jung

as Min Ji [Flight attendant]

Bintang Tamu

Cha Tae Hyun (차태현)

as [Con man]

Bintang Tamu

Ahn Jae Hong

as Kim Bong Seok "Missionary Thomas"

Bintang Tamu

Kim Sung Ryung

as Jang Jin-ok (Ep. 1-3)

Bintang Tamu

Lee Chae Kyung

as Sister Shin (Ep. 2)

Bintang Tamu

Seo Beom Shik

as [Gangster] (Ep. 2)

Bintang Tamu

Seo Dong Won

as [Aquarium manager] (Ep. 3-4)

Bintang Tamu

Seo In Sung

as [Boy bumps Sim Chung] (Ep. 3-4)

Bintang Tamu

Kim Kang Hyun

as [Police officer] (Ep. 5)

Bintang Tamu

Park Jin Joo (박진주)

as [Nurse] (Ep. 6)

Bintang Tamu

Kim Byung Chun

as [Vice President of Hospital] (Ep. 6.)

Bintang Tamu

Jo Jung Suk (조정석)

as Yoo Jong Hoon [Merman] (Ep. 7-8)

Bintang Tamu

Jung Yoo Mi

as Kim Hee Jin (Ep. 8)

Bintang Tamu

Ko Kyu Pil

as Han Seong Tae (Ep. 9)

Bintang Tamu

Im Won Hee

as [Doctor] (Ep. 19)

Bintang Tamu

Kim Seul Ki (김슬기)

as [Mermaid] (Ep. 20)

Bintang Tamu

Kim Ji An

as Kang Seo Hee [Young]

Bintang Tamu

Kim Sun Young

as [Woman at sauna]

Bintang Tamu

Lee Su Ryeon

as [Personal Shopper]

Bintang Tamu

Gu Da Song

as [Curious student]

Bintang Tamu

Kim Oh Bok

as [ER doctor]

Bintang Tamu

Lee Yu Jin

as [Woman @ open-air bath]

Bintang Tamu

Kim Yoon Tae

as [Lawyer]

Bintang Tamu

Noh Yi Han

as Ma Dae Young [Child]

Bintang Tamu

Kang Ro Chae

as [Lead female character on TV]

Bintang Tamu

Kim Dae Hyun

as Su Ha

Bintang Tamu

Park Sook Myung

as [Resident]

Bintang Tamu

Oh Yoo Mi

as [Mother with baby]

Bintang Tamu

In Sung Ho

Bintang Tamu

Gi Yeon Ho

Bintang Tamu

Kim Tae Young

Bintang Tamu

Choo Soo Bin

Bintang Tamu

Myung Seok Geun

Bintang Tamu

Park Seung Joon

as [Kid in picture]

Bintang Tamu

Kook Joong Woong

Bintang Tamu

Choi Chan Ho

Bintang Tamu

Seo Jeong Woo

as [High school student]

Bintang Tamu

Kim Jung Seok

as [Police chief]

Bintang Tamu

Oh Jin Ha

as [Gisaeng]

Bintang Tamu

Kim Joo Ah

as [Aqua Planet mother]

Bintang Tamu

Jung Tak

as [Boy in photo] (Ep. 11)

Bintang Tamu

Kim Seung Ho

Asisten Sutradara

Yoshimata Ryo

Composer

Huang Sae Joon

Composer

Jin Hyeok

Sutradara

Park Ji Eun

Screenwriter