शकुंतला देवी

Vidya Balan

as Shakuntala Devi

Sanya Malhotra

as Anupama Banerji

Jisshu Sengupta

as Paritosh Banerji

Amit Sadh

as Ajay Abhaya Kumar

Luca Calvani

as Javier

Sheeba Chaddha

as Tarabai

Prakash Belawadi

as Shakuntala's Father

Ipshita Chakraborty Singh

as Shakuntala's Mother

Ahan Nirban

as Srinivas

Chahat Tejwani

as Young Anu

Nisha Aaliya

as Bookshop Interviewer

Max Dowler

as BBC Host

Phillip Roy

as Mr. Stevens - Shakuntala's lawyer

Alex Bartram

as Edward

Purnendu Bhattacharya

as Ajay's Father

Neil Bhoopalam

as Dheeraj

Ian Bailley

as Mediator

Jon Wennington

as Mathematician (uncredited)