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)