| 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 | 1 |
| Kakuts, Ágnes | Ágnes Kakuts | Actor | 1989 | 2 | |
| Kaszás, Villő | Villő Kaszás | Actor | 1999 | 2 | |
| Krivonos, Irina | Irina Krivonos | Actor | 2001 - 2021 | 2 | 1 |
| Klimke, Christoph | Christoph Klimke | Dramaturg | 2003 | 2 | |
| Kefirova, Maria | Maria Kefirova | Actor, Choreographer | 2003 | 2 | |
| Kokoris, Stathis | Stathis Kokoris | Actor | 2003 - 2004 | 2 | |
| Konomi, Maria | Maria Konomi | Designer | 2003 - 2004 | 2 | |
| Kiss, Ernő | Ernő Kiss | Actor | 2005 | 2 | |
| Kricsár, Kamill | Kamill Kricsár | Actor | 2005 | 2 | |
| Konečná, Barbora | Barbora Konečná | Costume Designer, Designer | 2013 | 2 | |
| Klaus, Wilfried | Wilfried Klaus | Actor | 1976 | 2 | 1 |
| Kraus, Adam | Adam Kraus | Actor | 2010 | 2 | |
| Kubelka, Alexander | Alexander Kubelka | Director | 2004 - 2011 | 2 | 1 |
| Kofroň, Petr | Petr Kofroň | Composer | 2009 | 2 | 1 |
| Klestilová, Iva | Iva Klestilová | Dramaturg | 2009 | 2 | |
| Kypta, Tomáš | Tomáš Kypta | Costume Designer | 2008 | 2 | |
| Klemensová, Renáta | Renáta Klemensová | Actor | 2015 - 2018 | 2 | 1 |
| Klimczak, Kristian | Kristian Klimczak | Actor | 2004 | 2 | |
| Kyselák, Jiří | Jiří Kyselák | Adaptation, Director | 2007 | 2 | |
| Kraushaar, Oliver | Oliver Kraushaar | Actor | 2004 | 2 | |
| Kroher, Peter | Peter Kroher | Dramaturg | 2004 | 2 | |
| Kitagawa, Katsuhiro | Katsuhiro Kitagawa | Actor | 2004 - 2007 | 2 | |
| Khanh, Quoc | Quoc Khanh | Actor | 2004 - 2006 | 2 | |
| Kudláčková, Johana | Johana Kudláčková | Dramaturg | 2005 - 2006 | 2 | 1 |
| Kubátová, Jana | Jana Kubátová | Actor | 2005 - 2006 | 2 | 2 |
| Kostková, Zorka | Zorka Kostková | Actor | 2005 - 2006 | 2 | 1 |
| Krejsa, Miloslav | Miloslav Krejsa | Actor | 2005 - 2006 | 2 | |
| Kaška, Antonín | Antonín Kaška | Actor | 2005 - 2006 | 2 | |
| Krebs, Horst | Horst Krebs | Actor | 2004 - 2015 | 2 | 1 |
| Kolubkov, Aleksej | Aleksej Kolubkov | Actor | 2001 - 2004 | 2 | 1 |
| Kurdjubova, Natalja | Natalja Kurdjubova | Actor | 2001 - 2004 | 2 | 1 |
| Karbauskis, Mindaugas | Mindaugas Karbauskis | Director | 2001 - 2004 | 2 | 1 |
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