| Ernest Blyth | MP (uncredited) |
| A. J. Brown | Speaker of the House (uncredited) |
| John Blythe | Pub Customer (uncredited) |
| Avis Bunnage | Constituent (uncredited) |
| Marie Burke | Mary's Housekeeper (uncredited) |
| Jimmy Charters | Man at Earnley Station (uncredited) |
| Donald Churchill | Sheilah's Party Guest (uncredited) |
| Ernest Clark | M.P. (uncredited) |
| Marian Collins | Pretty Girl (uncredited) |
| George Curtis | Bobby (uncredited) |
| Dan Darnelli | MP (uncredited) |
| Mark Dignam | Earnley Constituent (uncredited) |
| Rex Garner | MP (uncredited) |
| Philip Gilbert | Terry Langham (uncredited) |
| Fred Griffiths | Taxi Driver (uncredited) |
| Jack Gwillim | MP (uncredited) |
| Victor Harrington | MP (uncredited) |
| Lindsay Hooper | MP (uncredited) |
| Walter Horsbrugh | House of Commons Archivist (uncredited) |
| Howard Lang | Labour Party Member greeting Johnnie Byrne (uncredited) |
| Aileen Lewis | Woman on Euston Station Platform (uncredited) |
| Jack Mandeville | Dancer in Nightclub (uncredited) |
| Colin McKenzie | Bobby (uncredited) |
| William Mervyn | Postmaster-General (uncredited) |
| Philip Ray | M.P - House of Commons Entrance Area (uncredited) |
| Oliver Reed | Man with Bucket on His Head (uncredited) |
| Jessie Robins | MP (uncredited) |
| Norman Rossington | Sykes of the Herald (uncredited) |
| Robert Sansom | Dying Minister (uncredited) |
| Ivan Santon | Man nudges Peter Finch (uncredited) |
| John Sharp | Railway Station Master (uncredited) |
| Emile Stemmler | MP (uncredited) |
| Jimmy Thompson | Sheilah's Party Guest (uncredited) |
| Joseph Tregonino | Waiter (uncredited) |
| Yolande Turner | Party Guest (uncredited) |
| Mona Washbourne | Well-wisher at Train Station (uncredited) |
| Johnny Wyne | MP (uncredited) |
