| Kjærulff-Schmidt, Helge | Helge Kjærulff-Schmidt | Actor | 1956 - 2003 | 4 | 1 |
| Keresztes, Attila | Attila Keresztes | Designer, Director | 2004 - 2022 | 14 | 1 |
| Kern, Dan | Dan Kern | Director | 1997 | 1 | 1 |
| Kesjár, Katinka | Katinka Kesjár | Actor | 2007 | 1 | 1 |
| Komáromi, Anett | Anett Komáromi | Actor | 2007 | 1 | 1 |
| Korkiakoski, Miika | Miika Korkiakoski | Actor | 2002 | 1 | 1 |
| Kiss, Eszter | Eszter Kiss | Actor | 2002 - 2023 | 3 | 1 |
| Kovács, Andrea | Andrea Kovács | Costume Designer | 1999 - 2002 | 2 | 1 |
| Kedveš, Elja-Duša | Elja-Duša Kedveš | Actor, Choreographer | 2002 - 2004 | 132 | 1 |
| Kulczyk, Todd | Todd Kulczyk | Director | 2002 | 1 | 1 |
| Kriegenburg, Andreas | Andreas Kriegenburg | Director | 1997 - 2002 | 4 | 1 |
| Karr, James | James Karr | Actor | 2002 | 1 | 1 |
| Korogodsky, Danila | Danila Korogodsky | Designer | 2002 | 1 | 1 |
| Kuhn, Gabriela | Gabriela Kuhn | Actor | 2002 | 9 | 1 |
| Kanka, Rafal | Rafal Kanka | Actor | 2002 | 12 | 1 |
| Korljan, Stela | Stela Korljan | Adaptation, Director | 2002 | 6 | 1 |
| Keim, Stefan | Stefan Keim | Actor | 2002 | 2 | 1 |
| Knutzon, Lars | Lars Knutzon | Adaptation, Director, Translator | 2002 - 2004 | 151 | 1 |
| Klingvall, Emil | Emil Klingvall | Actor | 2003 | 6 | 1 |
| Kahler, Stephanie | Stephanie Kahler | Actor | 2002 | 8 | 1 |
| Kubik, Anna | Anna Kubik | Actor | 2002 | 1 | 1 |
| Kézdi, Imola | Imola Kézdi | Actor | 2012 - 2017 | 7 | 1 |
| Kedvek, Richárd | Richárd Kedvek | Actor | 2012 | 2 | 1 |
| Kaplan, Ameenah | Ameenah Kaplan | Actor | 2003 | 1 | 1 |
| Kühnel, Tom | Tom Kühnel | Director | 1997 - 2015 | 3 | 1 |
| Krocheski, Adrienne | Adrienne Krocheski | Actor | 2003 | 1 | 1 |
| Krampe, Marc-Oliver | Marc-Oliver Krampe | Actor, Dramaturg | 2003 - 2010 | 13 | 1 |
| Karlberg, Johan | Johan Karlberg | Actor | 2001 - 2013 | 2 | 1 |
| Kraft, Iris | Iris Kraft | Costume Designer, Designer | 2003 - 2009 | 7 | 1 |
| Kinnaman, Melinda | Melinda Kinnaman | Actor | 1989 - 1998 | 2 | 1 |
| Krivonos, Irina | Irina Krivonos | Actor | 2001 - 2021 | 2 | 1 |
| Klassina, Tatjana | Tatjana Klassina | Actor | 2001 | 1 | 1 |
| Kenworthy, Melliss | Melliss Kenworthy | Actor | 2003 | 1 | 1 |
| Keogan, Paul | Paul Keogan | Adaptation, Lighting Designer | 2003 | 3 | 1 |
| Katona, László | László Katona | Actor | 2005 - 2007 | 56 | 1 |
| Kempers, Cornelia | Cornelia Kempers | Actor | 2003 | 4 | 1 |
| Kerekes, Éva | Éva Kerekes | Actor | 2012 | 1 | 1 |
| Király, Dániel | Dániel Király | Actor | 2012 | 1 | 1 |
| Kulcsár, Viktória | Viktória Kulcsár | Actor | 2012 | 1 | 1 |
| Kostka, Petr | Petr Kostka | Actor | 1964 - 2016 | 8 | 1 |
| Krejčí, Jaroslav | Jaroslav Krejčí | Actor | 2012 | 1 | 1 |
| Klaus, Wilfried | Wilfried Klaus | Actor | 1976 | 2 | 1 |
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