Rajinikanth

Dr. Vaseegaran / Chitti

Aishwarya Rai Bachchan

Sana

Danny Denzongpa

Dr. Bohra

Santhanam

Siva

Karunas

Ravi

Devadarshini

Latha

Sabu Cyril

Agent Shah

Kalabhavan Mani

Pachaimuthu

Cochin Haneefa

Traffic Police

Raaghav

Neighbourhood Bully

Boxer Dheena

Thug

Shriya Sharma

Curious Student

Sugunthan

Police Inspector

Delhi Kumar

Vaseegaran's Father

Revathi Sankaran

Vaseegaran's mother

Chaams

Barber

Devadasu Kanakala

K. Bhajanlal, a customer at The Park Hotel

Rekha Suresh

Savitha Reddy

Sana (voice)

S. P. Balasubramaniam

Playback Singer

Vijay Prakash

Playback Singer

Manish Malhotra

Costume Design

A.R. Rahman

Playback Singer

Krissy

Playback Singer

Pa. Vijay

Lyricist

Keerthi Sagathia

Playback Singer

Shweta Mohan

Playback Singer

Tanvi Shah

Playback Singer

Lady Kash

Lyricist

Shreya Ghoshal

Playback Singer

Pradeep Kumar

Playback Singer

Yuen Woo-ping

Stunt Coordinator

Mary E. Vogt

Costume Design

Khatija Rahman

Playback Singer

Madhan Karky

Lyricist

Yogi B

Playback Singer

Lady Kash

Playback Singer

Vairamuthu

Lyricist

Javed Ali

Playback Singer

Sadhana Sargam

Playback Singer

Krissy

Lyricist

Naresh Iyer

Playback Singer

Chinmayi Sripaada

Playback Singer

Hariharan

Playback Singer

Benny Dayal

Playback Singer

Pravin Mani

Playback Singer

Kamal Haasan

Thanks

Shankar

Director

Sujatha Rangarajan

Story

Shankar

Screenplay

A.R. Rahman

Original Music Composer

Sujatha Rangarajan

Dialogue

Shankar

Dialogue

Shankar

Story

Madhan Karky

Dialogue

Prabhu Deva

Choreographer

Anthony

Editor

Santosh Kotkar

Art Direction

Kalanithi Maran

Producer

Peter Hein

Stunts Coordinator

Dinesh Shikari

Choreographer

Atlee

Assistant Director

Shobi Paulraj

Choreographer

Sabu Cyril

Art Direction

R. Ratnavelu

Director of Photography

Raju Sundaram

Choreographer

Karthik G. Krish

Assistant Director

Frankie Chung

Visual Effects Supervisor