Suffering from temporary amnesia after a failed assassination attempt, Crown Prince Lee Yool (Do Kyung-soo) wanders about aimlessly until he is discovered by Hong Shim (Nam Ji-hyun). She takes him in and he assumes the identity of Won Deuk, a fictional man created by Hong Shim to avoid marriage by decree. 100 Days My Prince is a beautiful depiction of the relationship that develops between the two over the course of 100 days.
| Also Known As: | Dear Husband of 100 Days |
| Directed by: | Lee Jong-jae |
| Written by: | No Ji-sul |
| Starring: | Do Kyung-soo, Nam Ji-hyun, Jo Sung-ha, Jo Han-chul, Kim Seon-ho, Han So-hee, Kim Jae-young |
| Extended Cast: | Oh Yeon-ah Ji Min-hyuk, Choi Woong, Heo Jung-min, Jo Hyun-sik, Kang Young-seok, Son Kwang-eob, Jung Hae-kyun, Ahn Suk-hwan, Jo Jae-ryong, Lee Joon-hyuk, Lee Min-ji, Kim Ki-doo, Lee Hye-eun, Jung Soo-kyo, Kang Min, Lee Seung-hoon, Park Seon-woo, Lee Seung-joon, Lee Chae-kyung, Han Ji-eun, Lee Seon-hee, Keum Chae-an, Kim Ji-sung, Hong Yoon-jae, Lim Seung-jun, Ha Min, Jo Jin-chul, Eon Rae-ok, Jo Yeon-woo, Kim Tae-yeong, Jung Uk Park Chang-seon, Ji Sung-geun, Hong Bo-hyang, Yoon Yeo-heok, Jung Ho-bin, Choi Ji-na, Do Ji-han, Ahn Se-ha, Jin Ji-hee |
| Original network: | tvN |
| Original release: | 10 September 2018 - 30 October 2018 |
| No. of episodes: | 16 (+2 special) |
| Running Time: | 80 minutes |
| Executive producer(s): | Lee Sang-baek |
| Production Company(s): | AStory |
| Distributor: | tvN |
| Source: | TVN |
