Here are the main cast members:
* Kim Yun-seok as Popeye
* Kim Hye-soo as Cheon-nim
* Lee Jung-jae as "Z"
* Jun Ji-hyun as Yenicall
* Kim Soo-hyun as Zampa
* Kim Hae-sook as Macau Park
* Oh Dal-su as "Chewing Gum"
* Shin Hyun-bin as "Pal"
* Kim Myung-gon as "The Boss"
* Choi Min-sik as "The Boss"
* Kim Yoon-seok as "The Boss"
* Lee Jung-jae as "The Boss"
It's important to note that some of these actors play different roles in the film.
* Kim Yun-seok plays both Popeye and "The Boss" at different points in the film.
* Choi Min-sik, Kim Yoon-seok, and Lee Jung-jae all play "The Boss," with their appearances tied to specific flashback sequences.
This kind of casting decision adds a complex dynamic to the film, playing with the audience's perception of who "The Boss" really is.