| Kropff, Joop | Joop Kropff | Costume Designer, Designer | 1956 | 2 | |
| Karsten, Fred | Fred Karsten | Actor | 1956 - 1963 | 3 | |
| Kealey, Patrick | Patrick Kealey | Director | 1992 | 1 | |
| Klar, Wolfgang | Wolfgang Klar | Director | 1992 | 1 | |
| Klopfstock, Susanne | Susanne Klopfstock | Costume Designer, Designer | 1992 | 2 | |
| Keats, David | David Keats | Actor | 1992 | 1 | |
| Köhntopp, Katharina | Katharina Köhntopp | Actor | 1992 | 1 | |
| Kokoschka, M. | M. Kokoschka | Actor | 1992 | 1 | |
| Keuchel, Jürgen-Helmut | Jürgen-Helmut Keuchel | Actor, Adaptation | 1992 - 2015 | 2 | |
| Karamiteva, Margarita | Margarita Karamiteva | Actor | 1988 | 1 | |
| Karaivanova, Zhana | Zhana Karaivanova | Actor | 1988 | 1 | |
| Kwiatkowska, Tatiana | Tatiana Kwiatkowska | Costume Designer | 1991 - 1997 | 2 | |
| Krukówna, Agnieszka | Agnieszka Krukówna | Actor | 1991 - 1997 | 4 | |
| King, Howard | Howard King | Lighting Designer | 1988 | 1 | |
| Klein, Steven M. | Steven M. Klein | Sound Designer | 1992 | 1 | |
| Kaiser, Doris, Maria | Doris Maria Kaiser | Actor | 1992 | 1 | |
| Katz, Natasha | Natasha Katz | Lighting Designer | 1992 - 2009 | 2 | |
| Krikorian, Paul | Paul Krikorian | Actor | 1988 | 1 | |
| Knott, Dewayne | Dewayne Knott | Director | 1988 | 1 | |
| Kemp, Brian | Brian Kemp | Actor | 1992 | 2 | |
| Kingshott, Dennis | Dennis Kingshott | Lighting Designer | 1992 | 2 | |
| Kouwenhoven, Annet | Annet Kouwenhoven | Actor | 1988 - 2000 | 7 | |
| Kistler, Sabine | Sabine Kistler | Actor | 1992 | 1 | |
| Kerpel, Roger Van | Roger Van Kerpel | Actor | 1992 - 2001 | 7 | |
| Kunze, Dietrich | Dietrich Kunze | Director | 1992 | 1 | |
| Krane, Målfrid | Målfrid Krane | Actor | 1988 | 1 | |
| Kreituse, A | A, Kreituse | Costume Designer | 1992 | 1 | |
| Kaare, Beate | Beate Kaare | Actor | 1988 | 1 | |
| Kummerow, Irmgard | Irmgard Kummerow | Actor | 1989 - 1991 | 2 | |
| Koschel, Uta | Uta Koschel | Actor | 1991 - 1993 | 2 | |
| Kvifte, Tellef | Tellef Kvifte | Musician | 1988 | 1 | |
| Kraayenzank, Henk | Henk Kraayenzank | Designer, Lighting Designer | 1992 | 2 | |
| Kværne, Elisabeth | Elisabeth Kværne | Musician | 1988 | 1 | |
| Konings, Anneke | Anneke Konings | Costume Designer | 1992 | 1 | |
| Kuyl, Ivo | Ivo Kuyl | Dramaturg | 1992 | 1 | |
| Keogh, Garrett | Garrett Keogh | Actor | 1988 - 1991 | 4 | |
| Korte, Hans | Hans Korte | Actor, Director | 1960 - 1988 | 7 | |
| 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 | |
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