Dev Patel

~ as ~

Srinivasa Ramanujan

Jeremy Irons

~ as ~

G. H. Hardy

Toby Jones

~ as ~

Littlewood

Devika Bhise

~ as ~

Janaki

Stephen Fry

~ as ~

Sir Francis Spring

Kevin McNally

~ as ~

Major MacMahon

Jeremy Northam

~ as ~

Bertrand Russell

Anthony Calf

~ as ~

Howard

Pádraic Delaney

~ as ~

Beglan

Shazad Latif

~ as ~

Chandra Mahalanobis