நண்பன்

Ileana D'Cruz as Ria Santhanam S. J. Suryah as Panchavan Pariventhan Uma Padmanabhan as Mrs. Ramakrishnan Atlee as Appearance in “Asku Lasku” Song Srikanth as Venkat Ramakrishnan Sathyan Sivakumar as Srivatsan (Silencer) Balaji Venugopal as Ragging Senior Sathyaraj as Virumandi Santhanam (Virus) Adukalam Naren as Ramakrishnan Ajay Rathnam as Panchavan Pariventhan's father Indrans as Govindan Andrea Jeremiah as Ria Santhanam (voice) விஜய் as Panchavan "Pari" Pariventhan / Kosaksi "Pappu" Pasapugazh Jiiva as Sevarkodi Senthil Anuya Bhagvath as Shwetha Santhanam Manobala as Librarian Bose T.M. Karthik as Rakesh 'Price Tag'

Shankar Director, Dialogue, Screenplay Viveka Lyricist Javed Ali Playback Singer Sunidhi Chauhan Playback Singer Pa. Vijay Lyricist Rajkumar Hirani Original Story Anthony Editor Farah Khan Choreographer Krish Playback Singer Abhijat Joshi Original Story Vijay Prakash Playback Singer Chetan Bhagat Novel Chinmayi Sripaada Playback Singer Vidhu Vinod Chopra Original Story T. Muthuraj Art Direction Harris Jayaraj Original Music Composer Madhan Karky Dialogue, Lyricist Atlee Assistant Director Na. Muthu Kumar Lyricist