| Krieg-Helbig, Michael | Michael Krieg-Helbig | Actor | 1995 - 2009 | 3 | |
| Krestan, Gabriela | Gabriela Krestan | Actor | 1995 - 2005 | 3 | |
| Kübler, Samuel, Lukas | Samuel Lukas Kübler | Actor | 2002 | 3 | 1 |
| Kemter, Esther | Esther Kemter | Costume Designer | 2006 | 3 | |
| King, Floyd | Floyd King | Actor | 1998 | 3 | |
| Krausen, Park | Park Krausen | Actor | 1998 - 1999 | 3 | |
| Kahl, Franka, Anne | Franka Anne Kahl | Actor | 2002 - 2013 | 3 | |
| King, Kathy | Kathy King | Actor | 1969 - 1970 | 3 | |
| König, Michael | Michael König | Actor | 1968 - 1973 | 3 | 1 |
| Kunze, Hannelore | Hannelore Kunze | Actor | 1968 | 3 | |
| Kronlachner, Hubert | Hubert Kronlachner | Actor | 1962 - 1968 | 3 | |
| Kružíková, Helena | Helena Kružíková | Actor | 1960 - 2012 | 3 | |
| Karhi, Maija | Maija Karhi | Actor | 1953 - 1967 | 3 | |
| Kapor, Ljubomir | Ljubomir Kapor | Actor | 1967 - 2006 | 3 | |
| Kunčević, Ivica | Ivica Kunčević | Actor, Director | 1967 - 2007 | 3 | |
| Kruse, Heiner | Heiner Kruse | Actor | 1967 - 1971 | 3 | |
| Kollasch, Franz | Franz Kollasch | Actor | 1967 | 3 | |
| Kalske, Kullervo | Kullervo Kalske | Actor | 1966 - 1967 | 3 | |
| Key, Alison | Alison Key | Actor | 1967 | 3 | |
| Kovács, Martina | Martina Kovács | Actor | 2001 - 2002 | 3 | |
| Kovács, Edit | Edit Kovács | Actor | 1999 - 2007 | 3 | 1 |
| Kramer, Joel | Joel Kramer | Actor | 1965 - 1966 | 3 | |
| Kaloumenou, Ioanna | Ioanna Kaloumenou | Actor | 1966 - 1985 | 3 | |
| Kostka, Jiří | Jiří Kostka | Actor | 1942 - 1966 | 3 | |
| Král, Jaroslav | Jaroslav Král | Adaptation, Dramaturg | 1965 - 1993 | 3 | |
| Kóti, Árpád | Árpád Kóti | Actor | 1965 | 3 | |
| Kourkoulos, Nikos | Nikos Kourkoulos | Actor | 1965 - 1979 | 3 | |
| Kontoulis, Giannis | Giannis Kontoulis | Actor | 1964 - 1975 | 3 | |
| Koch, Sebastian | Sebastian Koch | Actor | 1989 | 3 | |
| Kiss, Eszter | Eszter Kiss | Actor | 2002 - 2023 | 3 | 1 |
| Kohl, Gertrud | Gertrud Kohl | Actor | 2000 - 2009 | 3 | |
| Kouloumbi, Christina | Christina Kouloumbi | Actor | 2002 | 3 | |
| Koutsoukou, Mairi | Mairi Koutsoukou | Actor | 2002 | 3 | |
| Kanagiou, Lambrini | Lambrini Kanagiou | Actor | 2002 | 3 | |
| Kirin, Mr. | Mr. Kirin | Actor | 1888 - 1898 | 3 | |
| Kubran, Martin | Martin Kubran | Dramaturg | 2013 - 2021 | 3 | |
| Kunc, Marek | Marek Kunc | Actor | 2002 | 3 | |
| Kühnel, Tom | Tom Kühnel | Director | 1997 - 2015 | 3 | 1 |
| Koppmann, Angelika | Angelika Koppmann | Actor | 2003 | 3 | |
| Kunze, Julia | Julia Kunze | Actor | 2003 | 3 | |
| Korink, Petra | Petra Korink | Designer | 2003 - 2004 | 3 | |
| Karlsen, Cicci, Jøssund | Cicci Jøssund Karlsen | Actor | 2015 | 3 | |
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