Trailer
Images
 | Rajinikanth as Dr. Vaseegaran / Chitti |
 | Aishwarya Rai Bachchan as Sana |
 | Danny Denzongpa as Dr Bohra |
 | Santhanam as Siva |
 | Karunas as Ravi |
 | Devadarshini as Latha |
 | Sabu Cyril as Agent Shah |
 | Kalabhavan Mani as Pachaimuthu |
 | Cochin Haneefa as Traffic Police |
 | Raaghav as Neighbourhood Bully |
 | Boxer Dheena as Thug |
 | Shriya Sharma as Curious Student |
 | Sugunthan as Police Inspector |
 | Delhi Kumar as Vaseegaran's Father |
| Revathi Sankaran as Vaseegaran's mother |
 | Java Sundaresan as Barber |
| Devadasu Kanakala as K. Bhajanlal |
 | Rekha Suresh |
| Savitha Reddy as Sana (voice) |
| Costume & Make-Up | |
| Manish Malhotra | Costume Design |
| Mary E. Vogt | Costume Design |
Crew | |
| Yuen Woo-ping | Stunt Coordinator |
Writing | |
| Vairamuthu | Lyricist |
| Madhan Karky | Lyricist |
| Pa. Vijay | Lyricist |
Sound | |
| S. P. Balasubramaniam | Playback Singer |
| A.R. Rahman | Playback Singer |
| Khatija Rahman | Playback Singer |
| Yogi B | Playback Singer |
| Keerthi Sagathia | Playback Singer |
| Shweta Mohan | Playback Singer |
| Tanvi Shah | Playback Singer |
Writing | |
| Lady Kash | Lyricist |
| Krissy | Lyricist |
Sound | |
| Lady Kash | Playback Singer |
| Krissy | Playback Singer |
| Vijay Prakash | Playback Singer |
| Shreya Ghoshal | Playback Singer |
| Pradeep Kumar | Playback Singer |
| Pravin Mani | Playback Singer |
| Javed Ali | Playback Singer |
| Chinmayi Sripaada | Playback Singer |
| Hariharan | Playback Singer |
| Sadhana Sargam | Playback Singer |
| Benny Dayal | Playback Singer |
| Naresh Iyer | Playback Singer |
Crew | |
| Kamal Haasan | Thanks |
Directing | |
| Shankar | Director |
Writing | |
| Sujatha Rangarajan | Story |
Sound | |
| A.R. Rahman | Original Music Composer |
Writing | |
| Shankar | Story |
| Shankar | Screenplay |
| Shankar | Dialogue |
| Sujatha Rangarajan | Dialogue |
| Madhan Karky | Dialogue |
Production | |
| Kalanithi Maran | Producer |
Camera | |
| R. Ratnavelu | Director of Photography |
Editing | |
| Anthony | Editor |
Art | |
| Santosh Kotkar | Art Direction |
Crew | |
| Peter Hein | Stunts Coordinator |
| Raju Sundaram | Choreographer |
| Dinesh Shikari | Choreographer |
| Shobi Paulraj | Choreographer |
| Prabhu Deva | Choreographer |
Directing | |
| Atlee | Assistant Director |
| Karthik G. Krish | Assistant Director |
Visual Effects | |
| Frankie Chung Chi-Hang | Visual Effects Supervisor |
Art | |
| Sabu Cyril | Art Direction |
