I Am Happy (2009) — Cast
Cast
| In-hwa Song | Sang |
| Ju-hee Oh | President Lindberg |
| Lee Bo-young | Won Kyeong |
| Hyun Bin | He-Man |
| Um Tae-goo | Airport Bartender |
| Seok-i Yun | Pharmacist |
| Oh Min-ae | Doctor |
| Han Eun-seon | So |
| Hyeong-gyu Im | building |
| Kim Sung-min | Hyeong-wook |
| Seon-yeong Jo | Directing Department |
| Jong-hwan Oh | Police Officer |
| Kyeong-wu Jwa | Scoundrel |
| Kim Hong-pa | Doctor |
| Kim Seong-yong | Scoundrel |
| Park Young-seo | Keun-bok |
| Park Hyo-ju | Nurse |
| Park No-shik | Chul |
Crew
| Lee Chang-jae | Director of Photography |
| Baek Kyung-in | Production Design |
| Lee Jeong-a | Script Supervisor |
| O Sang-jin | Costume Design |
| Yi Cheong-jun | Short Story |
| Yoon Jong-chan | Director |
| Yoon Jong-chan | Writer |
| Kim Dong-gi | Original Music Composer |
| Kyung Min-ho | Editor |