Colin Firth

Ewen Montagu

Matthew Macfadyen

Charles Cholmondeley

Kelly Macdonald

Jean Leslie

Rufus Wright

Lt. Bill Jewell

Ruby Bentall

Connie Bukes

Charlotte Hamblin

Patricia Trehearne

Johnny Flynn

Ian Fleming

Lorne MacFadyen

Sgt. Roger Dearborn, Glyndwr Michael

Penelope Wilton

Hester Leggett

Mark Gatiss

Ivor Montagu

Caspar Jennings

Jeremy Montagu

Hattie Morahan

Iris Montagu

Dolly Gadsdon

Jennifer Montagu

Simon Russell Beale

Winston Churchill

Michael Bott

Frank Sawyer (Churchill Butler)

Jason Isaacs

Admiral John Godfrey

Alex Jennings

John Masterman

Ellie Haddington

Hilda Georgina Cholmondeley