Cop Secret (Icelandic: Leynilögga) is a 2021 Icelandic action comedy film directed by Hannes Þór Halldórsson from a screenplay that he co-wrote alongside Nína Pedersen and Sverrir Þór Sverrisson. The film stars Auðunn Blöndal, Egill Einarsson, Björn Hlynur Haraldsson and Steinunn Ólína Þorsteinsdóttir.

The film is based on a fake movie trailer made by Auðunn, Hannes and Sverrir Þór Sverrisson for a TV show in 2011. The trailer featured Gísli Örn Garðarsson, Hjalti Árnason, Ingvar Eggert Sigurðsson, Hörður Magnússon and Hermann Gunnarsson. It premièred in the Concorso internazionale at the 74th Locarno Film Festival on 10 August 2021