நண்பன்

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

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