| Kastner, Gabriele | Gabriele Kastner | Actor | 1988 | 1 | |
| Kversøy, Beate P. | Beate P. Kversøy | Actor | 1988 | 1 | |
| Kizaki, Yuji | Yuji Kizaki | Adaptation, Director | 1988 | 2 | |
| Kuriki, Hideaki | Hideaki Kuriki | Adaptation | 1988 | 1 | |
| Kähling, Gerhard | Gerhard Kähling | Actor | 1988 | 1 | |
| Kökényessy, Ági | Ági Kökényessy | Actor | 1988 | 1 | |
| Kaszás, Attila | Attila Kaszás | Actor | 1988 | 1 | |
| Kéry, Gyula | Gyula Kéry | Actor | 1988 | 1 | |
| Kárpáti, Péter R. | Péter R. Kárpáti | Actor | 1988 | 1 | |
| 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 |
| Keogh, Garrett | Garrett Keogh | Actor | 1988 - 1991 | 4 | |
| Kersten, Renate | Renate Kersten | Dramaturg | 1988 - 1993 | 2 | |
| Kouwenhoven, Annet | Annet Kouwenhoven | Actor | 1988 - 2000 | 7 | |
| Keith, Warren | Warren Keith | Actor | 1988 - 2003 | 2 | |
| Krappatsch, Sylvana | Sylvana Krappatsch | Actor | 1988 - 2004 | 5 | 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 |
| Knudsen, Jørgen | Jørgen Knudsen | Actor, Composer, Musical Director, Musician | 1988 - 2007 | 83 | 1 |
| Kofránková, Hana | Hana Kofránková | Adaptation, Director | 1988 - 2012 | 16 | |
| Kulka, János | János Kulka | Actor | 1988 - 2013 | 2 | |
| Kern, András | András Kern | Actor | 1989 | 2 | |
| Kiss, Jenő | Jenő Kiss | Actor | 1989 | 2 | |
| Kalinowska, Halina | Halina Kalinowska | Composer | 1989 | 1 | |
| Krönke, Jan | Jan Krönke | Actor | 1989 | 1 | |
| Krönke, Anna | Anna Krönke | Actor | 1989 | 1 | |
| Kumagai, Akira | Akira Kumagai | Choreographer | 1989 | 1 | |
| Konwilski, Henryk | Henryk Konwilski | Choreographer | 1989 | 1 | |
| Krönke, Max | Max Krönke | Actor | 1989 | 1 | |
| Keith, Susan | Susan Keith | Actor | 1989 | 1 | |
| Krauze, Stanisław | Stanisław Krauze | Actor | 1989 | 1 | |
| Krawczyk, Bernard | Bernard Krawczyk | Actor | 1989 | 1 | |
| Kouris, Vasilis | Vasilis Kouris | Actor | 1989 | 1 | |
| Kougioumtzis, Mimis | Mimis Kougioumtzis | Director | 1989 | 1 | |
| Kentros, Giorgos | Giorgos Kentros | Actor | 1989 | 1 | |
| Karakonstantoglou, Periklis | Periklis Karakonstantoglou | Actor | 1989 | 1 | |
| Klein, Nita | Nita Klein | Actor | 1989 | 1 | |
| Kling, Gustav | Gustav Kling | Actor | 1989 | 1 | 1 |
| Kazakoff, Stephen | Stephen Kazakoff | Actor | 1989 | 1 | |
| Kehoe, Carol | Carol Kehoe | Actor | 1989 | 1 | |
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