John Mills

Cpl Tubby Binns

Richard Attenborough

John Holden

Bernard Lee

Charles Foreman

Robert Urquhart

Mike

Ray Jackson

Barlow

Ronald Hines

Private Miles

Sean Barrett

Frankie

Roland Curram

Harper

Meredith Edwards

Dave Bellman

Michael Bates

Froome

Rodney Diak

Pannet

Michael Shillo

Jouvet

Eddie Byrne

Commander (Tough's Yard)

Maxine Audley

Diana

Lionel Jeffries

Colonel (Medical Officer)

Victor Maddern

Merchant Seaman

Anthony Nicholls

Military Spokesman

Bud Flanagan

Himself

Chesney Allen

Himself

Kenneth Cope

Lieutenant Lumpkin

Denys Graham

Fraser

Barry Foster

Don R

Warwick Ashton

Battery Sergeant Major

Peter Halliday

Battery Major

John Welsh

Staff Colonel

Lloyd Lamble

Staff Colonel

Cyril Raymond

General The Viscount Gort V.C.

Nicholas Hannen

Vice Admiral Ramsay

Patricia Plunkett

Grace

Michael Gwynn

Commander (Sheerness)

Fred Griffiths

Old Sweat

Dan Cressey

Joe

Christopher Rhodes

Sergeant on the beaches

Harry Landis

Dr. Levy

John Horsley

Padre

Patrick Allen

Sergeant on Parade Ground

Liz Fraser

Worker in Holden's Factory (uncredited)

Michael Brennan

Paddle Steamer Captain (uncredited)

Bernard Cribbins

Thirsty Sailor (uncredited)

John G. Heller

German Soldier (uncredited)

John Phillips

Boat Owner Spokesman (uncredited)

William Squire

Captain (uncredited)

Tim Turner

Officer (line of men in sea) (uncredited)

Howard Lang

Chief - Sheerness Dockyard (uncredited)