| 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 | |
| Kapela, Wojciech | Wojciech Kapela | Lighting Designer | 2024 | 3 | |
| Kocurek, Michał | Michał Kocurek | Actor | 2024 | 3 | |
| Kösters, David | David Kösters | Actor | 2024 | 3 | |
| Klimáček, Viliam | Viliam Klimáček | Adaptation | 2024 - 2025 | 3 | |
| Kvasková, Zdenka | Zdenka Kvasková | Actor | 2024 - 2025 | 3 | |
| Ke, Zhou | Zhou Ke (周可) | Director | 2024 | 3 | |
| Klimoska, Sara | Sara Klimoska | Actor | 2024 - 2025 | 3 | |
| Klein, Karin | Karin Klein | Actor | 1987 - 2007 | 4 | |
| Kahn, Michael | Michael Kahn | Director | 1979 - 2001 | 4 | 1 |
| Kallio, Ismo | Ismo Kallio | Actor | 1966 - 2002 | 4 | 1 |
| Karlbeck, Marianne | Marianne Karlbeck | Actor | 1955 - 1994 | 4 | |
| Kärn, Jo | Jo Kärn | Actor | 1972 - 1998 | 4 | |
| Kárpáti, Enikő | Enikő Kárpáti | Costume Designer | 1989 - 2014 | 4 | |
| Karpinski, Gisbert | Gisbert Karpinski | Choreographer, Dancer | 1981 - 1992 | 4 | |
| Kearney, Kristine | Kristine Kearney | Costume Designer | 1984 - 2011 | 4 | |
| Kelemen, Éva | Éva Kelemen | Actor | 1941 - 1966 | 4 | |
| Kenda, Roland | Roland Kenda | Actor | 1981 - 2012 | 4 | |
| Kieburg, Christel | Christel Kieburg | Actor | 1953 - 1954 | 4 | |
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