| James Robertson Justice |
Sir Benjamin |
| Leslie Phillips |
Mervyn |
| Paul Massie |
Malcolm |
| Kenneth Williams |
Harold |
| Liz Fraser |
Miranda |
| Eric Barker |
Morgan Rutherford |
| Jennifer Jayne |
Jill |
| Jimmy Thompson |
Alex |
| Sid James (as Sidney James) |
Sid |
| Esma Cannon |
Mrs. Deevens |
| Joan Hickson |
Mrs. Bostwick |
| Geoffrey Keen |
Sir John |
| David Lodge |
Taxi Driver |
| Jill Ireland |
Janet |
| Ambrosine Phillpotts |
Mrs. Featherstone |
| Victor Maddern |
Removal Man 1 |
| Brian Oulton |
Concert Agent |
| Lance Percival |
Harry |
| Douglas Ives |
Street Musician 1 |
| Bernard Hunter |
1st Flute |
| Peter Howell |
Professor Lumb |
| George Woodbridge |
Yorkshire Orchestra Leader |
| Cyril Chamberlain |
L.A.M.A. Porter |
| Peter Byrne |
1st Horn |
| Peter Burton |
1st Viola |
| Erik Chitty |
Elderly Man |
| Jim Dale |
Bass Trombone |
| Henry Davies |
Carpenter |
| Nigel Arkwright |
4th 'Cellist |
| John Antrobus |
Street Musician 4 |
| Tom Clegg |
Street Musician 3 |
| Frank Forsyth |
Professor Abrahams |
| Terence Holland |
1st Trombone |
| Oliver Johnston |
Professor Parkin |
| Dorinda Stevens |
Doris |
| Michael Nightingale |
Invigilator |
| Ian Wilson |
Street Musician 2 |
| Michael Miller |
Barman |
| Horace Seguira |
Old Professor |
| Charles Stanley |
Removal Man 2 |
| Kenneth Kove (as Kenneth Cove) |
Street Musician 5 |