I Was a Spy is a 1933 British thriller film directed by Victor Saville and produced by Michael Balcon. It stars Madeleine Carroll as Marthe Cnockaert, Herbert Marshall, and Conrad Veidt. Based on the 1932 memoir I Was a Spy by Marthe Cnockaert, the film is about her experiences as a Belgian woman who nursed German soldiers during World War I while passing intelligence to the British. The film was produced by Gaumont British Picture Corporation with Woolf & Freedman Film Service and Fox Film Corporation distributing in the United Kingdom and the United States respectively.

Victor Saville was an English film director, producer, and screenwriter. He directed 39 films between 1927 and 1954. He also produced 36 films between 1923 and 1962.