David Niven as Lieutenant Jim Perry

Stanley Holloway as Pvt. Ted Brewer

James Donald as Pvt. Evans Lloyd

John Laurie as Pvt. Luke

Leslie Dwyer as Pvt. Sid Beck

Hugh Burden as Pvt. Bill Parsons

Raymond Huntley as Pvt. Herbert Davenport

Jimmy Hanley as Pvt. Geoffrey Stainer

William Hartnell as Sgt. Ned Fletcher

Reginald Tate as The Training Company Commanding Officer

Leo Genn as Captain Edwards

John Ruddock as Old Chelsea Soldier

A. Bromley Davenport as Old Chelsea Soldier

Renée Asherson as Marjorie Gillingham

Mary Jerrold as Mrs. Gillingham

Raymond Lovell as Mr. Jackson

Jack Watling as Sgt. Buster

Peter Ustinov as Rispoli

Lloyd Pearson as Sam Thyrtle

Penelope Dudley-Ward as Mrs. Perry

Esma Cannon as Mrs. Ted Brewer

Eileen Erskine as Mrs. Bill Parsons

Grace Arnold as Mrs. Ned Fletcher

Tessie O'Shea as Herself

Trevor Howard as Officer on Ship (uncredited)

George Merritt as Sergeant Major (uncredited)

Tracy Reed as Perry's Daughter (uncredited)

A.E. Matthews as Colonel Walmsley

John Boxer as Soldier in Pub Talking to the Chelsea Pensioners (uncredited)

Peggy Carlisle as Minor Role (uncredited)

Alf Goddard as Instructor (uncredited)

David Hutcheson as Garage Customer in Car (uncredited)

Benita Lydal as ENSA Artist (uncredited)

Andreas Malandrinos as Gendarme in Café (uncredited)

John Salew as Sam - Friend of Pvt. Lloyd in Pub Scene (uncredited)

Johnnie Schofield as Lewis Gun Instructor (uncredited)

Winifred Willard as Minor Role (uncredited)

Ben Williams as Pessimistic Man Talking to the Chelsea Pensioners (uncredited)