A Letter From Mars poster
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A Letter From Mars

5.720031h 37mMovieDramaRomance

Little Seung-jae stays up all night and writes letters to So-hee, pretending to be her father in Mars. Leaving Seung-jae's innocent heart behind, So-hee leaves for a big city. Both grown up to be adults, Seung-jae is a postman who writes…

DirectorKim Jeong-kwon
WritersJo Jung-hwa·Jang Jin

Where to watch

Rakuten VikiRakuten Viki
Availability shown for United States · rights vary by country

Cast · Directed by Kim Jeong-kwon

SHShin Ha-kyun
Shin Ha-kyun
Seung-jae
KHKim Hee-seon
Kim Hee-seon
So-hee
PSPark So-hyun
Park So-hyun
Sun-mi
KMKim Min-jun
Kim Min-jun
Seong-ho
KIKim In-kwon
Kim In-kwon
Ho-gul
PSPark Sung-woong
Park Sung-woong
LSLim Seung-dae
Lim Seung-dae
LJLee Jae-yong
Lee Jae-yong
Sueng-jae's Father
LGLee Geum-ju
Lee Geum-ju
Seung-jae's Mother
JDJo Deok-hyeon
Jo Deok-hyeon
So-hee's Father
LWLee Won-jong
Lee Won-jong
JGJeong Gyu-su
Jeong Gyu-su

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A Letter From Mars — streaming FAQ

Which OTT platform streams A Letter From Mars?

A Letter From Mars is streaming on Rakuten Viki in United States. It's not currently on Netflix.

Is A Letter From Mars on Netflix?

No, A Letter From Mars is not on Netflix in United States as of October 2026. It's currently on Rakuten Viki.

Is A Letter From Mars on Amazon Prime Video?

No, A Letter From Mars isn't on Amazon Prime Video in United States right now. It's on Rakuten Viki instead.

Where can I watch A Letter From Mars for free?

A Letter From Mars is available to stream free (with ads) on Rakuten Viki in United States.