Cast & crew
Blue Murder at St Trinian's (1957)
Directed by Frank Launder Written by Frank Launder, Sidney Gilliat, Val Valentine
Cast
| Terry-Thomas | Capt. Romney Carlton-Ricketts |
| George Cole | "Flash" Harry |
| Joyce Grenfell | Sgt. Ruby Gates |
| Sabrina | Virginia |
| Alastair Sim | Miss Amelia Fritton |
| Lionel Jeffries | Joe Mangan |
| Thorley Walters | Major Whitehart |
| Michael Ripper | Eric - The Liftman |
| Raymond Rollett | Chief Constable |
| Lloyd Lamble | Superintendent Samuel Kemp-Bird |
| Terry Scott | Police Sergeant |
| Ferdy Mayne | Italian Police Inspector |
| Ronald Ibbs | Lieutenant |
| Cyril Chamberlain | Army Captain |
| Judith Furse | Dame Maud Hackshaw |
| Kenneth Griffith | Charlie Bull |
| Richard Wattis | Manton Bassett |
| Lisa Lee | Miss Brenner |
| Guido Lorraine | Prince Bruno |
| Alma Taylor | Prince Bruno's Mother |
| Peter Jones | Prestwick |
| Peter Elliott | Equerry |
| Lisa Gastoni | Myrna Mangan |
| Charles Lloyd Pack | Henry Roberts - Prison Governor |
| Marigold Russell | Marjorie |
| Dilys Laye | Bridget Strong |
| Rosalind Knight | Annabel |
| Nicola Braithwaite | Daphne |
| Mandy Harper | Tilly |
| Jose Read | Cynthia Meadows |
| Pat Laurence | Mavis |
| Eric Barker | Culpepper Brown |
| Vikki Hammond | Jane Osborne |
| Janet Bradbury | Mercia |
| Moya Francis | Bissy |
| Lesley Scoble | Schoolgirl (uncredited) |
| Angela White | Schoolgirl (uncredited) |
| Edwina Carroll | |
| Esme Smythe | Guest (uncredited) |
| Carol White | Schoolgirl (uncredited) |
Crew
| Gerald Gibbs | Director of Photography |
| Malcolm Arnold | Original Music Composer |
| Frank Launder | Director |
| Michael Stevenson | Production Runner |
| Barbara Hopkins | Sound Assistant |
| Frank Launder | Writer |
| Sidney Gilliat | Writer |
| Val Valentine | Writer |
| Sidney Gilliat | Producer |
| Frank Launder | Producer |
| Ronald Searle | Characters |
| Geoffrey Foot | Editor |
| Ronald Searle | Novel |