David Oyelowo

Seretse Khama

Rosamund Pike

Ruth Williams-Khama

Tom Felton

Rufus Lancaster

Jack Davenport

Sir Alistair Canning

Terry Pheto

Naledi Khama

Laura Carmichael

Muriel Williams

Jessica Oyelowo

Lady Lilly Canning

Vusi Kunene

Tshekedi Khama

Nicholas Lyndhurst

George Williams

Arnold Oceng

Charles

Anastasia Hille

Dot Williams

Charlotte Hope

Olivia Lancaster

Theo Landey

Nash

Abena Ayivor

Ella Khama

Jack Lowden

Tony Benn

Zackary Momoh

Oluwu

Nicholas Rowe

Fenner Brockway

Billy Boyle

Reverend James Manners

Conny Stadler

Missionary

Kevin Hand

Manager

Ray Burnet

Reverend Leonard Patterson

Anton Lesser

Prime Minister Attlee

Michael Howe

Terence Bernard

Donald Molosi

Kabelo

Julian Firth

Mr. Speaker

Duncan Wisbey

Commonwealth Under-Secretary

Rupert Vansittart

Sir Ian Fraser

James Northcote

Roberts

Merveille Lukeba

Joe Appiah

Femi Ogunbanjo

Man from Rhodesia

Paul Putner

Porter

Will Featherstone

Reporter

Danny Babington

Reporter

Dave Perry

Idiot

Craig Whittaker

Idiot

Dean Roberts

Idiot

Kitty Devlin

Celia

Karl Farrer

Reporter (uncredited)