Miracle: Letters to the President is a 2021 South Korean romantic drama film directed and co-written by Lee Jang-hoon for Blossom Pictures. Starring Park Jeong-min, Lee Sung-min, Im Yoon-ah and Lee Soo-kyung, the film is based on a true story of a high school mathematics genius Joon-kyeong. Set in 1980s in a remote township of North Gyeongsang Province, the film tells the story of establishing a simple, privately owned train station.

Im Yoon-ah, known mononymously as Yoona, is a South Korean singer and actress. After training for five years, she debuted as a member of girl group Girls' Generation in August 2007, which went on to become one of the best-selling artists in South Korea and one of South Korea's most popular girl groups worldwide. Apart from her group's activities, Yoona has participated in various television dramas, notably You Are My Destiny (2008), which marked her career breakthrough and earned her the Best New Actress awards at the 23rd KBS Drama Awards and the 45th Baeksang Arts Awards.