| Keith, Warren | Warren Keith | Actor | 1988 - 2003 | 2 | |
| Křenek, Emanuel | Emanuel Křenek | Actor | 1965 - 1988 | 2 | |
| Kostřiba, Josef | Josef Kostřiba | Musical Director | 1988 | 1 | |
| Kyritsis, Giorgos | Giorgos Kyritsis | Actor | 1990 | 1 | |
| Kresta, Eirini | Eirini Kresta | Actor | 1990 | 1 | |
| Kalfagiannis, Giorgos | Giorgos Kalfagiannis | Lighting Designer | 1990 | 1 | |
| Kupfernagel, Matthias | Matthias Kupfernagel | Designer | 1988 | 1 | |
| Kiefel, Russell | Russell Kiefel | Actor | 1988 - 1989 | 2 | |
| Kingelin, Juha | Juha Kingelin | Actor | 1988 | 1 | |
| Kruger, Beatrice | Beatrice Kruger | Actor | 1988 | 1 | |
| Kraft, Karin | Karin Kraft | Actor | 1991 | 1 | |
| Krug, Ines | Ines Krug | Actor | 1991 - 2006 | 7 | |
| Kuhn, Hans Peter | Hans Peter Kuhn | Composer, Sound Designer | 1991 - 1993 | 7 | |
| Kunze, Rüdiger Walter | Rüdiger Walter Kunze | Actor, Director | 1991 - 2004 | 3 | |
| Kerssenbrock, Verena, von | Verena von Kerssenbrock | Designer | 1991 | 3 | |
| Kylin, Ann-Sofie | Ann-Sofie Kylin | Actor | 1990 | 1 | |
| Kilian, Ute | Ute Kilian | Actor | 1990 | 1 | |
| Kautz, Jürgen | Jürgen Kautz | Director | 1990 | 1 | |
| King, Raymond | Raymond King | Actor | 1990 | 1 | |
| Kirstel, Richard | Richard Kirstel | Actor | 1990 | 1 | |
| Karliczek, Karl | Karl Karliczek | Actor | 1990 | 1 | |
| Kühn, Isolde | Isolde Kühn | Actor | 1990 | 1 | |
| Konstantakopoulos, Ilias | Ilias Konstantakopoulos | Lighting Designer | 1991 | 1 | |
| Kratochwil, Franz | Franz Kratochwil | Actor | 1990 | 1 | |
| Kaiser, Dieter | Dieter Kaiser | Actor | 1990 | 1 | |
| Kern, Georges | Georges Kern | Actor | 1988 | 7 | |
| Kelly, Joe | Joe Kelly | Actor | 1991 | 1 | |
| Kvietik, Štefan | Štefan Kvietik | Actor | 1972 - 1990 | 2 | |
| Kurihara, Komaki | Komaki Kurihara | Actor | 1990 | 1 | |
| Kimura, Mifue | Mifue Kimura | Actor | 1990 | 1 | |
| Kemény, Árpád | Árpád Kemény | Costume Designer, Designer | 1970 - 1991 | 5 | |
| Kátay, Endre | Endre Kátay | Actor | 1991 | 1 | |
| Klepper, Pia | Pia Klepper | Costume Designer | 1990 | 1 | |
| Kocsó, Gábor | Gábor Kocsó | Actor | 1991 - 1994 | 6 | |
| Kriener, Martin | Martin Kriener | Actor | 1990 | 6 | |
| Klie, Matthias | Matthias Klie | Actor | 1990 | 1 | |
| Kober, Adrian | Adrian Kober | Musician | 1990 | 1 | |
| Kent, David G. | David G. Kent | Director | 1991 | 1 | |
| Kleij, Lis, van der | Lis van der Kleij | Choreographer | 1991 | 1 | |
| Kuiper, Marcella | Marcella Kuiper | Actor | 1991 | 1 | |
| Kevin, Michael | Michael Kevin | Actor | 1990 | 2 | |
| Kempen, Rhea, van | Rhea van Kempen | Actor | 1991 | 1 | |
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