The Belles of St Trinian's movie trailer HD (1954) - Plot synopsis: The schoolgirls of St. Trinian's are more interested in racing forms than books as they try to get-rich-quick. They are abetted by the headmistress' brother. Director: Frank Launder Writers: Frank Launder, Sidney Gilliat, Val Valentine Stars: Alastair Sim, Joyce Grenfell, George Cole genre: Comedy, Family