Tilda Swinton as Gertrude Bell (voice)

Adam Astill as Sgt. Frank Stafford

Tom Chadbon as Sir Valentine 'Domnul' Chirol

Simon Chandler as David Hogarth

Joanna David as Janet Courtney

Anthony Edridge as Sir Arnold 'A.T.' Wilson

Amed Hashimi as Suleiman Faidhi

Andrew Havill as Sir Percy Cox

Michael Higgs as General Sir Gilbert Clayton

Hayat Kamille as Mme. Jamil Zadeh

Rose Leslie as Young Gertrude Bell (voice)