| Karásek, Jan | Jan Karásek | Actor | 1989 | 3 | 5 |
| Kreutinger, Nils | Nils Kreutinger | Actor | 2005 - 2019 | 3 | |
| Kallio, Anu | Anu Kallio | Actor | 2005 | 3 | |
| Kinasewich, Orest | Orest Kinasewich | Actor | 1962 - 2001 | 3 | |
| Kulhánek, Rudolf | Rudolf Kulhánek | Actor | 1933 | 3 | |
| Keczek, Karina | Karina Keczek | Actor | 2001 | 3 | |
| Klootwijk, Ruud | Ruud Klootwijk | Actor, Designer, Producer | 2005 | 3 | |
| Kupiec, Mirosław | Mirosław Kupiec | Actor | 2007 | 3 | |
| Kostrzyński, Mateusz | Mateusz Kostrzyński | Actor | 2007 | 3 | |
| Kościuk, Michał | Michał Kościuk | Actor | 2006 - 2007 | 3 | |
| Kałużyński, Marek | Marek Kałużyński | Actor | 2006 - 2007 | 3 | |
| Kubalski, Tadeusz | Tadeusz Kubalski | Actor, Director | 1955 - 1957 | 3 | |
| Knowles, Patrick | Patrick Knowles | Actor | 1954 - 2001 | 3 | |
| Kumer Ghosh, Sunil | Sunil Kumer Ghosh | Translator | 2006 | 3 | |
| Kilroy, Thomas | Thomas Kilroy | Adaptation | 1989 - 2015 | 3 | 1 |
| Kumer Sarkar, Taposh | Taposh Kumer Sarkar | Actor | 2006 | 3 | |
| Kumar Dey, Anup | Anup Kumar Dey | Actor | 2006 | 3 | |
| Khokon, - | - Khokon | Actor | 2006 | 3 | |
| Kawser, - | - Kawser | Lighting Designer | 2006 | 3 | |
| Kleinwechter, Erwin | Erwin Kleinwechter | Actor | 2006 | 3 | |
| Koganei, Atsushi | Atsushi Koganei | Actor | 2006 | 3 | |
| Kawanaka, Kenjiro | Kenjiro Kawanaka | Actor | 2006 | 3 | |
| Kamogawa, Tenshi | Tenshi Kamogawa | Actor | 2006 | 3 | |
| Križan, Martin | Martin Križan | Actor | 2006 - 2007 | 3 | |
| Konečná, Zuzana | Zuzana Konečná | Actor | 2006 - 2007 | 3 | |
| Kuzmanich, Roberto | Roberto Kuzmanich | Director, Lighting Designer, Sound Designer | 2006 | 3 | |
| Kuzmany, Elfriede | Elfriede Kuzmany | Actor | 1961 - 1981 | 3 | |
| Kimbrell, Marketta | Marketta Kimbrell | Assistant Director | 1989 - 2006 | 3 | |
| Klammer, Michael | Michael Klammer | Actor | 2006 - 2008 | 3 | |
| Kundziņa, Ieva | Ieva Kundziņa | Costume Designer | 2008 - 2010 | 3 | |
| Kliegel, Leo | Leo Kliegel | Designer | 1943 - 1955 | 3 | |
| Korrontay, Michael | Michael Korrontay | Actor | 1955 | 3 | |
| Kumar, Vivek | Vivek Kumar | Actor | 2015 | 3 | |
| Kühne, Wolfgang | Wolfgang Kühne | Actor | 1955 | 3 | |
| Kaulbach, Margret | Margret Kaulbach | Costume Designer | 1954 - 1963 | 3 | |
| Kühn, Vincent | Vincent Kühn | Actor | 2009 - 2010 | 3 | |
| König, Ulrich | Ulrich König | Composer | 2009 - 2010 | 3 | |
| Kotzur, Sabine | Sabine Kotzur | Actor | 2009 - 2010 | 3 | 1 |
| Kielaitė, Donata | Donata Kielaitė | Actor | 2009 - 2010 | 3 | |
| Kyun, Cheong Hae | Cheong Hae Kyun | Actor | 2009 - 2012 | 3 | |
| Koon, Yeo Kook | Yeo Kook Koon | Lighting Designer | 2009 - 2012 | 3 | |
| Kraš, Eva | Eva Kraš | Actor | 2009 - 2013 | 3 | 1 |
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