Ralph Fiennes as Roald Dahl / Policeman

Benedict Cumberbatch as Henry Sugar / Make-Up Artist

Dev Patel as Dr. Chatterjee / John Winston

Ben Kingsley as Imdad Khan / Croupier

Richard Ayoade as Dr. Marshall / Yogi

Jarvis Cocker as Canasta Player / Manor Guest / Friend of Henry Sugar / Casino Entrance Man

Rebecca Cornford as Canasta Player / Manor Guest / Friend of Henry Sugar / Casino Guest / Hospital Nurse

David Gant as Casino Croupier

Martin Foreman as Casino Guest

Agatino Trimarchi as Casino Guest

Christopher J. Long as Casino Guest

Richard Sisson as Casino Guest

Josephine Bygrave as Casino Guest

Linda Catt as Casino Guest

Robin Catt as Casino Guest

Bob Elam as Casino Guest

Robert Boyd-Howell as Casino Guest

Linda Telfer as Casino Guest

Aimee Gibson as Casino Guest

Jean Everest as Casino Guest

Clare Wignall as Casino Guest

Cynthia Almrott as Casino Guest

Bahzad Zad as Circus Audience

Bipula Parker as Circus Audience

Rupinder Kaur as Circus Audience

Hunain Abbas as Circus Audience

Fathimah Quraishe as Circus Audience / Hospital Nurse

Swastee Kejiou as Circus Audience / Hospital Nurse

Sirjit Singh Marway as Circus Audience

Hardip Singh as Circus Audience

Amma Paru Bhagwandeen as Circus Audience

Sudha Sama as Circus Audience

Ravinder Patwal as Circus Audience

Dheleel George Managlan as Circus Audience

Kiranjit Kaur as Circus Audience

Jaspreet Rehal as Circus Audience

Prabhnoor Kaur as Circus Audience

Ayush Britto as Circus Audience

Harjun Bassi as Circus Audience

Harley Sisan as Circus Audience

Uday Nind as Circus Audience

Frances Harmon as Make-Up Artist

Mita Chowdhury as Dr. Mitra

Sambathkumar Anbalagan as Yogi Disciple

Chandresh Gohil as Circus Vendor