love with Pari.(Voice dubbed by Andrea Jeremiah) Sathyaraj as Virumandi Santhanam ('Virus'): Principal of the engineering college. He is very strict and disciplined. He hates Pari because he used to question Virus against his rules or discipline. Sathyan as Srivatsan alias silencer/silent kusu: A topper student who was very well in all subjects. He was a little back in speaking Tamil. He too hated Pari. Anuya as Shwetha Santhanam : Riya's elder sister, and Virus's first daughter. T. M. Karthik as Rakesh ('Pricetag'): Riya's ex-fiancé, who cares only about money and ostentation. Manobala as Librarian Bose Shanmugasundaram as Kalvi (Education) Minister Uma as Mrs. Ramakrishnan, Venkat's mother, a loving and caring parent. Aadukalam Naren as Ramakrishnan (nicknamed Hitler Ramakrishnan by Pari, Venkat and Senthil), Venkat's father, a strict but loving parent who just wants his son to be happy Sreeja Ravi as Doctor Sreedevi Gengiah as Senthil's sister Indrans as Govindan, Virus's assistant Balaji Venugopal as "Semester" Purai, a senior college student at IEC responsible for leading the ragging there. Venkat Sundar as Ragging Senior Rinson Simon as younger Manimaran, nicknamed "Millimetre": an adolescent, he earns a small living by doing errands for students, such as laundry, finishing assignments, and getting groceries. Pari persuades him to buy a school uniform and sneak into school to gain an education. Vikas as older Manimaran, nicknamed "Centimetre": assistant to Pari/Kosaksi Pasapugazh in Dhanushkodi Shankar Sundaram as Examiner Ramanathan as Interviewer Cameo appearances S. J. Suryah as the real Panchavan Parivendhan. It is from him that Senthil and Venkat learn the truth: Panchavan's father sponsored an orphaned servant boy called 'Pappu', who had demonstrated his intelligence and love of learning, to earn a degree in the real Panchavan's name, while he was in London. He appreciates what Pappu did for him, and tells Senthil and Venkat where to find him. His sister Nimi was in love with Venkat. Vijay Vasanth as Paneer Selvam: a student with a passion for machines. After Virus tells him that he will not graduate, he commits suicide. Ajay Rathnam as Panchavan and Nimi's father S. Shankar as Director in Asku Laska song Atlee as Assistant Director in Asku Laska song Shobi in Asku Laska song Production Pre-production Following Gemini Film Circuit's purchase of the remake rights for 3 Idiots in January 2010, there was much speculation in regards to the three title roles played by Aamir Khan, R. Madhavan