A former Mafia boss Song gets out of jail and wants to get revenge on one of his gang members, Tai, who married the woman that he loved 20 years ago.
Unfortunately the movie Smiling Gangster is not yet available on HBO Max.
| Directing | Rerkchai Paungpetch | Director |
| Production | Kriangkai Chetchotisak | Executive Producer |
| Production | Surachai Chetchotisak | Executive Producer |
| Production | Sirada Buddajak | Line Producer |
| Writing | Rerkchai Paungpetch | Screenplay |
| Writing | Rerkchai Paungpetch | Story |
| Production | Nopphadol Arkart | Production Designer |
| Editing | Saknakorn Nethan | Editor |
| Directing | Wanchanok Sa-ard | Assistant Director |
| Directing | Prasit Roswan | Assistant Director |
| Directing | Chaiwat Sitalasai | Assistant Director |
| Art | Suntad Pansombut | Art Direction |
| Costume & Make-Up | Vuttinun Khumartdee | Costume Designer |
| Costume & Make-Up | Narudee Sakulpongchai | Makeup Artist |
| Costume & Make-Up | Bunga Buachalern | Hairstylist |
| Costume & Make-Up | Sawittree Salamtae | Hairstylist |
| Sound | Waigoon Laopipatpinyo | Sound Recordist |
| Camera | Paiboon Phupradub | Director of Photography |
| Production | Jantima Liawsirikun | Producer |
| Production | Rerkchai Paungpetch | Producer |
| Editing | Rerkchai Paungpetch | Editor |
