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விஜய் as Panchavan 'Pari' Pariventhan / Kosaksi 'Pappu' Pasapugazh |
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Jiiva as Sevarkodi Senthil |
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Srikanth as Venkat Ramakrishnan |
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Ileana D'Cruz as Ria Santhanam |
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Sathyaraj as Virumandi 'Virus' Santhanam |
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S. J. Suryah as Panchavan Pariventhan |
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Sathyan Sivakumar as 'Silencer' Srivatsan |
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Anuya Bhagvath as Shwetha Santhanam |
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Manobala as Librarian Bose |
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Uma Padmanabhan as Mrs. Ramakrishnan |
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Vijay Vasanth as Paneerselvam |
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T.M. Karthik as Rakesh 'Price Tag' |
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Adukalam Naren as Ramakrishnan |
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Ajay Rathnam as Panchavan Pariventhan's father |
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Indrans as Govindan |
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Balaji Venugopal as Ragging Senior |
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Venkat Sundar as Ragging Senior |
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Andrea Jeremiah as Ria Santhanam (voice) |
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Atlee as Self |
| Editing | Anthony | Editor |
| Directing | Shankar | Director |
| Camera | Manoj Paramahamsa | Director of Photography |
| Sound | Harris Jayaraj | Original Music Composer |
| Sound | Amrit Pritam Dutta | Sound Designer |
| Sound | Vijay Kumar | Sound Editor |
| Directing | Atlee | Assistant Director |
| Writing | Madhan Karky | Dialogue |
| Art | Krishnamani | Set Designer |
| Sound | Kannan Ganpat | Sound Mixer |
| Crew | Farah Khan | Choreographer |
| Writing | Shankar | Dialogue |
| Art | T. Muthuraj | Art Direction |
| Writing | Chetan Bhagat | Novel |
| Writing | Viveka | Lyricist |
| Visual Effects | 鍾智行 | Visual Effects Supervisor |
| Writing | Abhijat Joshi | Original Story |
| Writing | Madhan Karky | Lyricist |
| Writing | Rajkumar Hirani | Original Story |
| Sound | Vijay Prakash | Playback Singer |
| Production | A Manohar Prasad | Producer |
| Writing | Na. Muthu Kumar | Lyricist |
| Sound | Sunidhi Chauhan | Playback Singer |
| Sound | Suchith Suresan | Playback Singer |
| Writing | Shankar | Screenplay |
| Sound | Aalaap Raju | Playback Singer |
| Sound | Javed Ali | Playback Singer |
| Writing | Vidhu Vinod Chopra | Original Story |
| Sound | SuVi | Playback Singer |
| Sound | Ramakrishnan Murthy | Playback Singer |
| Sound | Chinmayi Sripaada | Playback Singer |
| Writing | Pa. Vijay | Lyricist |
| Sound | Krish | Playback Singer |
