The Legend of the Blue Sea

How can a mermaid from the Joseon era survive in modern-day Seoul?

A mermaid from the Joseon period ends up in present-day Seoul, where she crosses paths with a swindler who may have ties to someone from her past.

Comedy Drama Sci-Fi & Fantasy

Gianna Jun

(Shim Cheong / Se-hwa)

Lee Min-ho

(Heo Joon-jae / Kim Dam-ryung)

Lee Hee-jun

(Jo Nam-doo / Park Moo)

Shin Won-ho

(Tae-oh)

Shin Rin-a

(Seo Yoo-na)

Shin Hae-sun

(Cha Shi-ah)

Moon So-ri

(Ahn Jin-joo)

Na Young-hee

(Mo Yoo-ran)

Hwang Shin-hye

(Kang Seo-hee/Kang Ji-yeon)

Oh Yeon-ah

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

Lee Ji-hoon

(Heo Chi-hyun)

Park Hae-soo

(Hong Dong-pyo)

Sung Dong-il

(Ma Dae-young / Yang Seung-gil)

Choi Jung-woo

(Heo Il-joong)

Jinyoung

(Young Heo Joon-jae/Kim Dam-ryeong)

Hong Jin-kyung

(Shim Cheong's Homeless Friend)

Park Ji-il

(Manager Nam)

Lee Jae-won

(Cha Dong-shik)

Shim Yi-young

(Young Moo Yoo-ran)

Shin Eun-soo

(Young Se-hwa)

Kim Sung-ryung

(Jang Jin-ok)

Cho Jung-seok

(Yoo Jong-hoon)

Choi Kwon

(Young Manager Nam)

Kal So-won

(Child Se-hwa)

Jeon Jin-seo

(Child Heo Joon-jae/Kim Dam-ryeong)

Lee Ho-jae

(Professor Jin Kyung-won/Fortune Teller)

Seo Dong-won

(Aquarium Manager)

Krystal Jung

(Flight Attendant)

Kim Hye-yoon

(Jang Jin-ok's Daughter)

Sung Chang-hoon

(Mr. Yang's Subordinate)

Ko Kyu-pil

(Bodyguard)

Ahn Jae-hong

(Missionary Thomas)

Park Jin-joo

(Nurse)

Jeong Yu-mi

(Kim Hee-jin)

Kim Seul-gi

(Mermaid)

Carson Allen

(Mermaid)