| Kneidinger, Karl | Karl Kneidinger | Actor | 1903 - 1917 | 3 | |
| Kummer, Hansruedi | Hansruedi Kummer | Actor | 1993 | 3 | |
| Kottow, Hans | Hans Kottow | Actor, Director | 1906 - 1908 | 3 | |
| Khorami, Sara | Sara Khorami | Actor | 2018 - 2019 | 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 | |
| Kelln, Mya | Mya Kelln | Director, Sound Designer | 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 | |
| Kindermann, Uta | Uta Kindermann | Director | 2005 | 4 | |
| Kirk, John | John Kirk | Actor | 2008 | 4 | |
| Klietsch, Erwin | Erwin Klietsch | Actor | 1937 - 1939 | 4 | |
| Komulainen, Eeva-Kirsti | Eeva-Kirsti Komulainen | Actor | 1999 - 2008 | 4 | |
| Konrath, Edith | Edith Konrath | Actor | 2002 - 2007 | 4 | 1 |
| Korhonen, Jaakko | Jaakko Korhonen | Actor | 1922 - 1935 | 4 | 1 |
| Kosmowska, Ada | Ada Kosmowska | Actor | 1902 - 1921 | 4 | |
| Krämer, Oliver | Oliver Krämer | Actor, Composer | 1987 - 1991 | 4 | |
| Krügler, Ingo | Ingo Krügler | Costume Designer | 2002 - 2008 | 4 | |
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