| Kühn, Rainer | Rainer Kühn | Actor | 1998 - 2015 | 3 | |
| Kilby, Bernard | Bernard Kilby | Actor | 1958 | 3 | |
| Kinney, Lee | Lee Kinney | Sound Designer | 2016 - 2021 | 3 | |
| Kraus, Willi | Willi Kraus | Actor | 1915 - 1917 | 3 | |
| Kapelios, Nikos | Nikos Kapelios | Actor | 2013 | 3 | |
| Kranz, Daniela | Daniela Kranz | Director | 2013 - 2014 | 3 | 1 |
| Kinzinger, Irene | Irene Kinzinger | Actor | 1953 | 3 | |
| Kilpeläinen, Hillevi | Hillevi Kilpeläinen | Actor | 1998 | 3 | |
| Koch, Sophie | Sophie Koch | Actor | 1998 - 2000 | 3 | |
| Küngas, Aksel | Aksel Küngas | Actor | 1962 | 3 | |
| Kalmet, Hanno | Hanno Kalmet | Actor | 1962 | 3 | |
| Kuramoto, Yasufumi | Yasufumi Kuramoto | Actor | 1998 - 1999 | 3 | |
| Kentish, Agatha | Agatha Kentish | Actor | 1931 | 3 | |
| Kaila, Essi | Essi Kaila | Actor | 1998 | 3 | |
| Kramer, Karsten | Karsten Kramer | Actor | 1999 | 3 | |
| Koht, Fritzie | Fritzie Koht | Actor | 1936 - 1939 | 3 | |
| Klöhn, André | André Klöhn | Actor | 1999 | 3 | |
| Kampanis, Fanis | Fanis Kampanis | Actor | 1938 - 1939 | 3 | |
| Keen, Geoffrey | Geoffrey Keen | Actor | 1946 - 1952 | 3 | |
| Kildahl, Erling, E. | Erling E. Kildahl | Director | 1946 - 1948 | 3 | 1 |
| Kilbride, Richard | Richard Kilbride | Actor | 1947 - 1949 | 3 | |
| Kijowski, Kazimierz | Kazimierz Kijowski | Actor | 1923 | 3 | |
| Kofoed, Annika | Annika Kofoed | Actor | 2000 | 3 | 1 |
| Kuş, Gamze | Gamze Kuş | Costume Designer, Designer | 2012 - 2018 | 3 | |
| Kovjanić, Dubravka | Dubravka Kovjanić | Actor | 2000 | 3 | |
| Kull, Elle | Elle Kull | Actor | 1978 | 3 | |
| Klenskaja, Maria | Maria Klenskaja | Actor | 1978 - 1989 | 3 | |
| Knutzen, Rolf | Rolf Knutzen | Actor | 1899 - 1900 | 3 | 1 |
| Konstantinou, Ilektra | Ilektra Konstantinou | Actor | 1993 | 3 | |
| Kneidinger, Karl | Karl Kneidinger | Actor | 1903 - 1917 | 3 | |
| Kummer, Hansruedi | Hansruedi Kummer | Actor | 1993 | 3 | |
| Kottow, Hans | Hans Kottow | Actor, Director | 1906 - 1908 | 3 | |
| Kesterčanek, Mr | Mr Kesterčanek | Actor | 1891 - 1898 | 3 | |
| Konfár, Erik | Erik Konfár | Actor | 2017 | 3 | |
| Kostovski, Branko | Branko Kostovski | Designer, Set Designer | 1957 - 1976 | 3 | |
| Kos, Boštjan | Boštjan Kos | Lighting Designer | 2014 - 2025 | 3 | |
| Kopittke, Sigrid | Sigrid Kopittke | Assistant Director, Costume Designer, Designer | 2018 | 3 | |
| Kvartalova, N. | N. Kvartalova | Actor | 1907 - 1910 | 3 | |
| Karlsen, Amund, Sigurdssønn | Amund Sigurdssønn Karlsen | Actor | 2020 | 3 | |
| Kuzina, Anastasiya | Anastasiya Kuzina | Dancer | 2021 | 3 | |
| Kiala, Para | Para Kiala | Actor | 2023 - 2024 | 3 | |
| Kulyabin, Timofey Aleksandrovich | Timofey Aleksandrovich Kulyabin (Тимофей Александрович Кулябин) | Director | 2012 - 2025 | 3 | |
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