577 Project
577 Project (Korean: 577 프로젝트) is a 2012 South Korean documentary film directed by Lee Keun-woo. The film chronicles a cross-country walking journey undertaken by actor Ha Jung-woo and a group of fellow actors and actresses, including Kong Hyo-jin, to fulfill a public pledge.

Background and Origin
The premise of the film originated at the 46th Paeksang Arts Awards in 2010, where actor Ha Jung-woo received the Best Actor award for his performance in Take Off. During his acceptance speech, Ha jokingly promised that if he were to win the same award the following year, he would walk across South Korea. When Ha subsequently won the Best Actor award at the 47th Paeksang Arts Awards in 2011 for his role in The Yellow Sea, he decided to honor his commitment.
Production and Journey
The production follows Ha Jung-woo as he organizes a group of colleagues to accompany him on a trek from Seoul to Haenam. The journey spanned 577 kilometers over a period of 20 days and 19 nights. The documentary captures the physical challenges, interpersonal dynamics, and personal reflections of the participants throughout the expedition.

Cast
The film features the participants appearing as themselves, including:
- Ha Jung-woo
- Kong Hyo-jin
- Kim Sung-kyun
- Cha Hyeon-woo
- Han Soo-hyun
- Kang Shin-chul
- Lee Ji-hoon
- Ha Suk
- Lee Soo-in
- Park Ah-in
- Lee Seung-joon
- Lee Sang-won
- Choi Hee-seo
- Yang Ji-soo