O Kadhal Kanmani

Dulquer Salmaan

Aadi

Nithya Menen

Tara

Prakash Raj

Ganapathy

Leela Samson

Bhavani

Vinodhini Vaidyanathan

Saroja

Ramya Subramanian

Ananya

Prabhu Lakshman

Buddy

Sivakumar Ananth

Vasudevan Varadarajan

Rama Ramasamy

Chandrika

John Devasahayam

John

Chandrika Chandran

Ratna

Baby Rakshana

Jaya Vasudevan

Padam Bhola

Vishal

Kaniha

Woman at the clinic (Cameo Appearance)

B. V. Doshi

Self

Aarav Kizar

Adhi's co-worker

Ashwin Kumar

Ciby Bhuvana Chandran

Tanveer Mir

Assistant Director of Photography

Sharmishta Roy

Production Design

P. C. Sreeram

Director of Photography

C H Balu

Still Photographer

Eka Lakhani

Costume Designer

Brinda

Choreographer

Nikhil Murugan

Public Relations

Arivumani

Stunt Coordinator

Anbumani

Stunts Coordinator

Dhana

Assistant Director

Mani Ratnam

Director

Saravanan Madheswaran

Assistant Editor

Sreekar Prasad

Editor

Mala Manyan

Executive Producer

Mani Ratnam

Producer

A.R. Rahman

Original Music Composer

A. R. Ameen

Playback Singer

Jonita Gandhi

Playback Singer

Anand Krishnamoorthi

Sound Designer

Sudipto Mukhopadhyay

Sound Mixer

Sirivennela Seetharama Sastry

Lyricist

Mani Ratnam

Screenplay, Story