R. Madhavan

Nambi Narayanan

Simran

Meena

Misha Ghoshal

Geeta Narayanan

Jagan

Scientist

Dinesh Prabhakar

L. D. Gopal

Ron Donachie

Col. Cleaver

Vincent Riotta

Luigi Crocco

Phyllis Logan

Mrs Cleaver

Gulshan Grover

A. P. J. Abdul Kalam

Ravi Raghavendra

Vikram Sarabhai

Shyam Renganathan

Shankar Narayanan

Karthik Kumar

P. M. Nayar

Mohan Raman

Udupi Ramachandra Rao

Sriram Parthasarathy

Barry Amaldev

Bijou Thaangjam

Studio Personnel

Rajeev Ravindranathan

Param

Sam Mohan

Unni

Bhawsheel Singh Sahni

Sartaj

Jack Dimich

Professor Eugene Scott

Karina Matas Piper

Michelle

Gaurav Venkatesh

Studio Personnel

Abhirami Venkatachalam

Boyfriend Girl

James Eliya

Unni's Father in law

Suriya

Interviewer (Tamil version)

Shah Rukh Khan

Interviewer (Hindi version)

Muralidaran

Arunan

Emma Gojković

Elizabeth