Abhinay Vaddi
Srinivasa Ramanujan
Suhasini Maniratnam
Komalatammal
Bhama
Janaki
Nizhalgal Ravi
Srinivasa Raghavan
Kevin McGowan
G. H. Hardy
Abbas
Prasanta Chandra Mahalanobis
Y. G. Mahendran
S. Narayana Iyer
Sarath Babu
Diwan Bahadur R. Ramachandra Rao I. C. S.
Radha Ravi
Prof. Singaravelu Mudaliar
Thalaivasal Vijay
Sathiyapriya Rayar
Kitty
Seshu Iyer
Anmol
Young Srinivasa Ramanujan
Richard Walsh
Francis Spring
Michael Lieber
John Edensor Littlewood
Delhi Ganesh
Manobala
Krishna Rao
T. P. Gajendran
T. Namberumal Chetty
Madhan Bob
Prof. Krishna Shastri
Lavanya
Mohan Raman
Mohan Sharma
Meera Krishnan
Bala Singh
Boys Rajan
Satish Kumar
Anandhu
Manibharathi
Krishnan
Kalaikumaran
Nali Kuppusamy Chettiyar
Kalyana Malai Mohan
Calcutta Krishnamoorthy
P.V. Ranganathan
Harsh Naik
Chatterjee
Mike Parish
Doctor Charles
Lizzie Bourne
Ms. Gertrude Hardy
Cloudia Swann
Ms. Bourne
Grisham Peters
Colin Tierney
Steve Lester
Marc Rolfe
Terry Billings
Nick Robinson
Deepshika Arora
Bernadette Lemon
Alixandra Kos
Jon Wennington
Professor (Uncredited)