Anna Bache-Wiig (born 19 September 1975) is a Norwegian actress and writer.

She is best known for writing the screenplay for the film Utøya: July 22 in collaboration with Siv Rajendram Eliassen.

[2] Together with Siv Rajendram Eliassen, Bache-Wiig created and wrote the first season of the television series Frikjent (Acquitted) in 2016.

In the UK, it was screened on Walter Presents, a video on demand service provided by Channel 4.

The two stayed teamed up with director Erik Poppe to write a new screenplay, The Emigrants, which will be released in 2020.