Aagot Nissen (née Kavli; May 2, 1882 – December 16, 1978) was a Norwegian actress.

She was the sister of painter Arne Kavli (1878–1970) and was married to pianist Karl Nissen (1879–1920).

[2] [3] She made her stage debut in 1899 at Oslo's National Theatre.

[4] She was the only actor that worked continuously for more than fifty seasons at the National Theatre from its start in 1899.

[5] According to historian Nils Johan Ringdal, Nissen was the most employed actress at the National Theatre from the theatre's establishment, with a total of more than 200 assigned tasks.