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Knocking (Swedish: Knackningar) is a 2021 Swedish thriller film directed by Frida Kempff and written by Emma Broström, based on a short story by Johan Theorin. The film stars Cecilia Milocco, Krister Kern, Albin Grenholm, Ville Virtanen, and Alexander Salzberger. The film had its world premiere at the 2021 Sundance Film Festival on January 30, 2021.