| Kotrba, Jaroslav | Jaroslav Kotrba | Actor | 1965 | 2 | |
| Kabelák, Jiří | Jiří Kabelák | Actor | 1965 | 2 | |
| Kníže, Jaroslav | Jaroslav Kníže | Actor | 1965 | 2 | |
| Kelley, Hugh | Hugh Kelley | Actor | 1965 | 2 | |
| Kala, Uta | Uta Kala | Costume Designer, Designer | 1997 | 2 | |
| Kósa, Béla | Béla Kósa | Actor | 2005 | 2 | |
| Kövesdi, László | László Kövesdi | Actor | 2005 | 2 | |
| Kiss, Eszter | Eszter Kiss | Actor | 2002 - 2023 | 2 | |
| Kovács, Andrea | Andrea Kovács | Costume Designer | 1999 - 2002 | 2 | |
| King, Ryan | Ryan King | Actor | 2002 | 2 | |
| Kucheran, Tamara Marie | Tamara Marie Kucheran | Costume Designer, Designer | 2002 | 2 | |
| Klaußner, Burghart | Burghart Klaußner | Actor, Director | 2002 - 2013 | 2 | |
| Kessel, Jonna | Jonna Kessel | Designer | 2002 - 2004 | 2 | |
| Körbel, Hans-Georg | Hans-Georg Körbel | Actor | 2000 - 2002 | 2 | |
| Keim, Stefan | Stefan Keim | Actor | 2002 | 2 | 1 |
| Kaul, Hans | Hans Kaul | Composer | 2002 - 2008 | 2 | |
| Klubowicz, Marta | Marta Klubowicz | Actor | 2002 | 2 | |
| Karner, Brigitte | Brigitte Karner | Actor | 2002 - 2003 | 2 | |
| Klautzer, Alfons | Alfons Klautzer | Actor | 2002 - 2003 | 2 | |
| Kummer, Engelbert | Engelbert Kummer | Lighting Designer | 2002 - 2003 | 2 | |
| Karampetsis, Dimitris | Dimitris Karampetsis | Actor | 2002 - 2012 | 2 | |
| Kyriakaki-Loukissa, Olympia | Olympia Kyriakaki-Loukissa | Musical Director | 1978 - 2002 | 2 | |
| Kačalina, Elena | Elena Kačalina | Actor | 2002 - 2004 | 2 | |
| Kalan, Sašo | Sašo Kalan | Sound Designer | 2000 - 2002 | 2 | |
| Kirin, Mr. | Mr. Kirin | Actor | 1888 - 1894 | 2 | |
| Kubran, Martin | Martin Kubran | Dramaturg | 2013 - 2015 | 2 | |
| Kedvek, Richárd | Richárd Kedvek | Actor | 2012 | 2 | 1 |
| Koula, Kamil | Kamil Koula | Actor | 2002 | 2 | |
| Klemens, Václav | Václav Klemens | Adaptation, Director | 2002 | 2 | |
| Kavaldjieva, Nevena | Nevena Kavaldjieva | Costume Designer, Designer | 2003 | 2 | |
| Kavardzhikova, Maria | Maria Kavardzhikova | Actor | 1997 - 2006 | 2 | |
| Krochesky, Adrienne | Adrienne Krochesky | Actor | 2001 | 2 | |
| Karlberg, Johan | Johan Karlberg | Actor | 2001 - 2013 | 2 | 1 |
| Kaluhokalani, Kekoa | Kekoa Kaluhokalani | Actor | 2001 | 2 | |
| Kropp, Günther | Günther Kropp | Actor | 1965 - 1989 | 2 | |
| Kouta, Melita | Melita Kouta | Costume Designer, Designer | 2003 | 2 | |
| Koltai, János | János Koltai | Actor | 1971 - 1975 | 2 | |
| Kiss, Ferenc Dávid | Ferenc Dávid Kiss | Actor | 1976 | 2 | |
| Kinnaman, Melinda | Melinda Kinnaman | Actor | 1989 - 1998 | 2 | |
| Kakuts, Ágnes | Ágnes Kakuts | Actor | 1989 | 2 | |
| Kaszás, Villő | Villő Kaszás | Actor | 1999 | 2 | |
| Klimke, Christoph | Christoph Klimke | Dramaturg | 2003 | 2 | |
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