Benedict Cumberbatch
Henry Sugar / Max Engelman / Harry
Dev Patel
Dr. Chatterjee / John Winston / Woods
Ben Kingsley
Imdad Khan / The Dealer / Dr. Ganderbai
Richard Ayoade
Dr. Marshall / The Great Yogi / Various
Ralph Fiennes
Roald Dahl / The Policeman / Rat Man
David Gant
Casino Croupier
Jarvis Cocker
Casino Receptionist and More
Rupert Friend
Narrator / Claud