Carol Marsh
Susan Graham
David Tomlinson
Nick Martin
Mervyn Johns
Ernest Bennett
Richard Hearne
Professor Pastry
Terry-Thomas
Self
Jimmy Edwards
Dr. Edwards
Peter Hammond
Spencer Stone
Jon Pertwee
Headwaiter
Wilfrid Hyde-White
Dr. B. Jekyll
Peter Haddon
Major Basil Beagle
Geoffrey Sumner
Humphrey Beagle
Zena Marshall
Giselle
Colin Gordon
Chadbeater Longwick
Judith Furse
Mrs. Martin
Edmund Willard
Ezekial
Henry Kendall
Lord Bruce Carlton
Bill Fraser
Oliver Cromwell
Shirl Conway
Cabaret Star
George Benson
Temporary Waiter
Sandra Dorne
Receptionist
Patricia Raine
Amber
Ronald Adam
Director General of the BBC (uncredited)
Johnny Briggs
BBC Page Boy (uncredited)
Esma Cannon
Autograph Huntress (uncredited)
Cyril Chamberlain
(uncredited)
Andrew Crawford
First BBC Announcer (uncredited)
Valentine Dyall
Man Telling Story at BBC (uncredited)
Danny Green
Liftman (uncredited)
Kenneth Griffith
Nick Martin's BBC Colleague (uncredited)
James Hayter
Inn Landlord (uncredited)
Glynis Johns
Miranda Trewella (uncredited)
Michael Medwin
Man Giving BBC Boxing Talk (uncredited)
Hal Osmond
Radio Sound-Effects Man (uncredited)
Brian Oulton
BBC Producer (uncredited)
Wally Patch
BBC Commissionaire (uncredited)
Dennis Price
Lord Byron (archive footage) (uncredited)
Basil Radford
Maj. Bright (uncredited)
Harry Secombe
Alf (uncredited)
Anthony Steel
(uncredited)
Michael Ward
News Reader (uncredited)
Richard Wattis
Compere of Nick Nack Show (uncredited)
Naunton Wayne
Capt. Early (uncredited)