My Sassy Girl (엽기적인 그녀; literally, That Bizarre Girl) is a 2001 South Korean romantic comedy film directed by Kwak Jae-yong, in which the lead protagonist's chance meeting with a drunk girl on the train changes his life. It is based on the true story told in a series of love letters written by Kim Ho-sik, a man who initially posted them on the Internet and later adapted them into a novel.
The film was extremely successful in South Korea. When My Sassy Girl was released throughout East Asia, it became a mega blockbuster hit in the entire region, from Japan, China, Taiwan, Hong Kong, Singapore, as well as South East Asia, to the point where it was drawing comparisons to Titanic. An American remake, starring Jesse Bradford and Elisha Cuthbert, and directed by Yann Samuell was released in 2008. A Japanese drama adaptation with Tsuyoshi Kusanagi and actress Rena Tanaka as the leads started broadcasting in April 2008.