நண்பன்

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

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