Adhi and Tara are in a live-in relationship but they are both unwilling to get married. How do they realize that marriage is just a natural progression of their relationship?
You can now watch O Kadhal Kanmani online on the following streaming providers in the United States.
| Production | Mani Ratnam | Producer |
| Editing | Sreekar Prasad | Editor |
| Directing | Mani Ratnam | Director |
| Sound | A.R. Rahman | Original Music Composer |
| Camera | P. C. Sreeram | Director of Photography |
| Crew | Anbumani | Stunts Coordinator |
| Editing | Saravanan Madheswaran | Assistant Editor |
| Sound | Sudipto Mukhopadhyay | Sound Mixer |
| Sound | Anand Krishnamoorthi | Sound Designer |
| Crew | Brinda | Choreographer |
| Camera | C H Balu | Still Photographer |
| Writing | Mani Ratnam | Screenplay |
| Sound | Jonita Gandhi | Playback Singer |
| Costume & Make-Up | Eka Lakhani | Costume Designer |
| Sound | A. R. Ameen | Playback Singer |
| Production | Mala Manyan | Executive Producer |
| Crew | Arivumani | Stunt Coordinator |
| Writing | Mani Ratnam | Story |
| Crew | Nikhil Murugan | Public Relations |
| Art | Sharmishta Roy | Production Design |
| Writing | Sirivennela Seetharama Sastry | Lyricist |
