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

Mohan Raman

Udupi Ramachandra Rao

Bijou Thaangjam

Studio Personnel

Sam Mohan

Unni

Jack Dimich

Professor Eugene Scott

Karina Matas Piper

Michelle

Abhirami Venkatachalam

Boyfriend Girl

James Eliya

Unni's Father in law

Suriya

Interviewer (Tamil version)

शाहरुख़ ख़ान

Interviewer (Hindi version)

Emma Gojković

Elizabeth