| Kleiven, Jostein | Jostein Kleiven | Actor | 1989 - 1998 | 10 | |
| Kallaanvaara, Michael | Michael Kallaanvaara | Actor | 1989 - 1998 | 3 | |
| Kinnaman, Melinda | Melinda Kinnaman | Actor | 1989 - 1998 | 2 | 1 |
| Kolář, Ladislav | Ladislav Kolář | Actor, Composer | 1989 - 2000 | 7 | |
| Korstad, Magne | Magne Korstad | Actor, Dancer | 1989 - 2004 | 24 | |
| Korstad, Ruth | Ruth Korstad | Actor, Dancer | 1989 - 2004 | 25 | |
| Kimbrell, Marketta | Marketta Kimbrell | Assistant Director | 1989 - 2006 | 3 | |
| Klenk, Thomas | Thomas Klenk | Actor | 1989 - 2011 | 10 | 1 |
| Kárpáti, Enikő | Enikő Kárpáti | Costume Designer | 1989 - 2014 | 4 | |
| Kilroy, Thomas | Thomas Kilroy | Adaptation | 1989 - 2015 | 3 | 1 |
| Kelly, David | David Kelly | Actor | 1989 - 2024 | 4 | 1 |
| Katsimichas, Giannis | Giannis Katsimichas | Actor | 1989 - 2024 | 2 | |
| Kaiser, Matthias | Matthias Kaiser | Dramaturg | 1990 | 1 | |
| Kato, Akiko | Akiko Kato | Actor | 1990 | 1 | |
| Keith, Kallie | Kallie Keith | Actor | 1990 | 1 | |
| Kristensen, Bente | Bente Kristensen | Costume Designer | 1990 | 1 | |
| Kusslid, Kristin | Kristin Kusslid | Actor | 1990 | 2 | |
| Koch, Danielle T. | Danielle T. Koch | Actor | 1990 | 1 | |
| Knoesen, Pierre | Pierre Knoesen | Actor | 1990 | 1 | |
| Kampestuen, Akiko | Akiko Kampestuen | Mask Maker | 1990 | 1 | |
| Keir, Sasha | Sasha Keir | Costume Designer | 1990 | 2 | |
| Kocyba, Tadeusz | Tadeusz Kocyba | Composer | 1990 | 1 | |
| Kalantzopoulos, Panos | Panos Kalantzopoulos | Composer | 1990 | 1 | |
| Kyriakidis, Stefanos | Stefanos Kyriakidis | Actor | 1990 | 1 | |
| Koch, Caspar | Caspar Koch | Actor | 1990 | 1 | |
| Korsgaard, Poul | Poul Korsgaard | Actor | 1990 | 1 | |
| Korsgaard, Hans | Hans Korsgaard | Actor | 1990 | 1 | |
| Kell, Joseph | Joseph Kell | Actor | 1990 | 1 | |
| Karlsson, Willy | Willy Karlsson | Actor | 1990 | 1 | |
| Kołodziejczyk, Jerzy | Jerzy Kołodziejczyk | Director | 1990 | 1 | |
| Komorowska, Małgorzata | Małgorzata Komorowska | Designer | 1990 | 1 | |
| Kiesewetter, Ekkehard | Ekkehard Kiesewetter | Director | 1990 | 1 | |
| Krumrey, Jürgen | Jürgen Krumrey | Actor | 1990 | 1 | |
| Kreutzer, Fred | Fred Kreutzer | Actor | 1990 | 1 | |
| Kaupenjohann, Bernd | Bernd Kaupenjohann | Designer | 1990 | 1 | |
| Krohm, Uli | Uli Krohm | Actor | 1990 | 1 | |
| Kyritsis, Giorgos | Giorgos Kyritsis | Actor | 1990 | 1 | |
| Kresta, Eirini | Eirini Kresta | Actor | 1990 | 1 | |
| Kalfagiannis, Giorgos | Giorgos Kalfagiannis | Lighting Designer | 1990 | 1 | |
| Kylin, Ann-Sofie | Ann-Sofie Kylin | Actor | 1990 | 1 | |
| Kilian, Ute | Ute Kilian | Actor | 1990 | 1 | |
| Kautz, Jürgen | Jürgen Kautz | Director | 1990 | 1 | |
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