When I Was The Prettiest follows two brothers Seo Hwan (Ji Soo) and Seo Jin (Ha Seok-jin) who both fall in love with the same woman Oh Ye-ji (Im Soo-hyang).
| Also Known As: | When I Was The Most Beautiful, When I’m The Prettiest |
| Directed by: | Oh Kyung-hoon |
| Written by: | Jo Hyoun-kyoung |
| Starring: | Im Soo-hyang, Ji Soo, Ha Seok-jin |
| Extended Cast: | Hwang Seung-eon, Choi Jung-hwan, Park Ji-young, Kwon Hyuk, Kim Mi-kyung, Lee Jae-yong, Shin Yi, Jung Ae-ri, Jung Eun-pyo, Son Bo-seung, Jung Wook-min, Seo Eun-woo, Park Keun-rok, Lee Seung-il, Kim No-jin |
| Original network: | MBC |
| Original release: | 19 August 2020 |
| No. of episodes: | 16 |
| Running Time: | 70 Minutes |
| Production Company(s): | May Queen Pictures |
| Distributor: | MBC |
| Source: | MBC |
