Diane Lavinia Hart (20 July 1926 – 7 February 2002) was an English actress in both films and the theatre in the West End Theatre of London, political campaigner, and inventor. Born in 1926, Hart was educated at various convents and then at Abbot's Hill School, King's Langley (where she was a Classics scholar). She went after her Matriculation at 14 to RADA at a very young age in 1941. She started working for the BBC as a secretary and, in the middle years of the Second World War, was an audio engineer, where she was instrumental in playing Hitler's speeches back to the Germans from the BBC in the UK over their airwaves.