Margarethe von Oven

Margarethe von Oven (11 March 1904, Berlin – 5 February 1991, Göttingen) was a secretary in the Bendlerblock and an accomplice in the 20 July plot to assassinate Adolf Hitler.

In the summer of 1943, Major General Henning von Tresckow requested that she be transferred to his office, placing complete trust in her because she was his wife's best friend since childhood.

When Tresckow was posted to the Eastern Front, Margarethe was reassigned as a secretary in the headquarters of Army Group Centre, serving as a news headline monitor for the Berlin coup plotters.

[2] After the failure of the assassination attempt on 20 July 1944, Oven was arrested and held for two weeks, but after questioning she was allowed to return to her job at the Bendlerblock.

In the 2008 film Valkyrie, starring Tom Cruise as Claus von Stauffenberg, she was portrayed by Dutch actress Halina Reijn.