| Karásek, Jan | Jan Karásek | Actor | 1989 | 3 | 5 |
| Kitsch, Lynn | Lynn Kitsch | Actor | 1989 | 1 | |
| Ko, Sung-gi | Sung-gi Ko | Actor | 1989 | 1 | |
| Kleger, Sandro | Sandro Kleger | Actor | 1989 | 1 | |
| Kemp, Robert | Robert Kemp | Designer | 1989 | 1 | 1 |
| Karlsén, Stephan | Stephan Karlsén | Actor | 1989 | 2 | |
| Krassnitzer, Harald | Harald Krassnitzer | Actor | 1989 | 2 | |
| Kajtna, Birgit | Birgit Kajtna | Actor | 1989 | 1 | |
| Kurzwernhart, Alexander | Alexander Kurzwernhart | Actor | 1989 | 5 | |
| Kurta, Andras | Andras Kurta | Choreographer | 1989 | 1 | |
| Kriš, Peter | Peter Kriš | Actor | 1989 | 1 | |
| Koso, Ištvan | Ištvan Koso | Designer | 1989 | 1 | |
| Kaljusaar, Erika | Erika Kaljusaar | Actor | 1989 | 1 | |
| Kiisk, Kaljo | Kaljo Kiisk | Actor | 1989 | 1 | |
| Kokamägi, Epp-Maria | Epp-Maria Kokamägi | Costume Designer, Designer | 1989 | 2 | |
| Kleimjonova, Lilia | Lilia Kleimjonova | Assistant Director | 1989 | 1 | |
| Kulka, János | János Kulka | Actor | 1988 - 2013 | 2 | |
| Kofránková, Hana | Hana Kofránková | Adaptation, Director | 1988 - 2012 | 16 | |
| Knudsen, Jørgen | Jørgen Knudsen | Actor, Composer, Musical Director, Musician | 1988 - 2007 | 83 | 1 |
| Koutrakis, Stratos | Stratos Koutrakis | Lighting Designer | 1988 - 2006 | 7 | |
| Kruschke, Annett | Annett Kruschke | Actor, Choreographer, Director | 1988 - 2006 | 4 | 1 |
| Kerr, Patrick | Patrick Kerr | Actor | 1988 - 2006 | 2 | 2 |
| Krappatsch, Sylvana | Sylvana Krappatsch | Actor | 1988 - 2004 | 5 | 1 |
| Keith, Warren | Warren Keith | Actor | 1988 - 2003 | 2 | |
| Kouwenhoven, Annet | Annet Kouwenhoven | Actor | 1988 - 2000 | 7 | |
| Kersten, Renate | Renate Kersten | Dramaturg | 1988 - 1993 | 2 | |
| Keogh, Garrett | Garrett Keogh | Actor | 1988 - 1991 | 4 | |
| Koumarias, Nikos | Nikos Koumarias | Actor | 1988 - 1989 | 6 | |
| Kyriakoglou, Meni | Meni Kyriakoglou | Actor | 1988 - 1989 | 6 | |
| Kiefel, Russell | Russell Kiefel | Actor | 1988 - 1989 | 2 | 1 |
| Kaalund, Lars | Lars Kaalund | Actor | 1988 | 1 | |
| Kordula, Ela | Ela Kordula | Actor | 1988 | 1 | |
| Keliuotytė, Ausra | Ausra Keliuotytė | Actor | 1988 | 1 | 5 |
| Kovalčiukas, Vladimiras | Vladimiras Kovalčiukas | Designer | 1988 | 1 | |
| Kreissman, Jonathan | Jonathan Kreissman | Actor | 1988 | 1 | |
| Knight, Wendy McClure | Wendy McClure Knight | Choreographer | 1988 | 1 | |
| Kotsiris, Lampros | Lampros Kotsiris | Actor | 1988 | 1 | |
| Kostřiba, Josef | Josef Kostřiba | Musical Director | 1988 | 1 | |
| Kupfernagel, Matthias | Matthias Kupfernagel | Designer | 1988 | 1 | |
| Kingelin, Juha | Juha Kingelin | Actor | 1988 | 1 | |
| Kruger, Beatrice | Beatrice Kruger | Actor | 1988 | 1 | |
| Kern, Georges | Georges Kern | Actor | 1988 | 7 | |
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