August Diehl (German pronunciation: [aʊ̯ˈɡʊst diːl]; born 4 January 1976) is a German actor, primarily known to international audiences for playing Gestapo major Dieter Hellstrom in Quentin Tarantino's Inglourious Basterds (2009) and Michael "Mike" Krause, Evelyn Salt's husband, in the movie Salt.

He is also known for his leading roles in the films The Counterfeiters (2007), The Young Karl Marx (2017), and Terrence Malick's A Hidden Life (2019).

[2] Growing up in a family of artists, at the age of 18, he played Franz Mohr in a school theatre production of Die Räuber by Friedrich Schiller.

[3] After passing the Abitur exams, Diehl studied acting at the renowned Hochschule für Schauspielkunst Ernst Busch in Berlin.

In 2024, he appeared in the fantasy-drama The Master and Margarita, based on the novel by Mikhail Bulgakov, playing a devil-like character called Woland.