A tale of two gangsters from the eras of past and present, whose lives enter parallel paths as they struggle to survive within Bombay's criminal underworld.
Unfortunately the movie Once Upon a Time in Mumbaai is not yet available on HBO Max.
| Production | Ekta Kapoor | Producer |
| Production | Shobha Kapoor | Producer |
| Directing | Milan Luthria | Director |
| Editing | Akiv Ali | Editor |
| Production | Meraj Shaikh | Executive Producer |
| Production | Guneet Monga | Supervising Producer |
| Writing | Rajat Arora | Story |
| Camera | Aseem Mishra | Director of Photography |
| Sound | Pritam Chakraborty | Original Music Composer |
| Sound | Tulsi Kumar | Playback Singer |
| Sound | Rahat Fateh Ali Khan | Playback Singer |
| Sound | Mohit Chauhan | Playback Singer |
| Sound | KK | Playback Singer |
| Sound | Dominique Cerejo | Playback Singer |
| Sound | Sunidhi Chauhan | Playback Singer |
| Sound | Rana Mazumder | Playback Singer |
| Sound | Zubeen Garg | Playback Singer |
| Sound | Mika Singh | Playback Singer |
| Sound | Sandeep Shirodkar | Additional Soundtrack |
| Writing | Amitabh Bhattacharya | Lyricist |
| Writing | Irshad Kamil | Lyricist |
| Writing | Nilesh Mishra | Lyricist |
| Art | Nitin Chandrakant Desai | Art Direction |
| Production | Gautam Kishanchandani | Casting Director |
| Costume & Make-Up | Manoshi Nath | Costume Design |
| Costume & Make-Up | Rushi Sharma | Costume Design |
| Costume & Make-Up | Aalim Hakim | Hairstylist |
| Crew | Abbas Ali Moghul | Stunt Coordinator |
