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

Mark Morrison

Bernadette Lemon

Alixandra Kos

Jon Wennington

Professor (Uncredited)