| Kahiluoto, Atro | Atro Kahiluoto | Adaptation, Director | 1995 - 2008 | 6 | 1 |
| Kellogg, Marjorie Bradley | Marjorie Bradley Kellogg | Designer | 1981 - 1990 | 2 | 1 |
| Kundler, Andreas | Andreas Kundler | Actor | 2007 - 2016 | 8 | 1 |
| Krepper, Magnus | Magnus Krepper | Actor | 2007 - 2012 | 6 | 1 |
| Kopernikus, Nicolaj | Nicolaj Kopernikus | Actor | 2006 | 2 | 1 |
| Keller, Inge | Inge Keller | Actor | 1975 - 1989 | 5 | 1 |
| Kallergis, Lykourgos | Lykourgos Kallergis | Actor, Director | 1939 - 1990 | 38 | 1 |
| Kamper, Thomas | Thomas Kamper | Actor | 1981 - 2008 | 12 | 1 |
| Kaalø, Sten | Sten Kaalø | Translator | 1981 | 1 | 1 |
| Kahn, Micheline | Micheline Kahn | Actor | 1981 - 2005 | 12 | 1 |
| Keller, Jan | Jan Keller | Director | 1956 | 1 | 1 |
| Katz, Leon | Leon Katz | Adaptation, Dramaturg, Translator | 1983 | 3 | 1 |
| Kennedy, Laurie | Laurie Kennedy | Actor | 1983 - 2016 | 2 | 1 |
| Kauppi, Lo | Lo Kauppi | Actor | 1998 | 1 | 1 |
| Kingdon, James | James Kingdon | Actor | 2007 - 2021 | 4 | 1 |
| Karner, Markus | Markus Karner | Designer | 2008 - 2010 | 2 | 1 |
| Kapelonis, Kostis | Kostis Kapelonis | Director | 2002 - 2010 | 7 | 1 |
| Kalmár, Zsuzsa | Zsuzsa Kalmár | Actor | 2011 | 2 | 1 |
| Kassar, Ayez | Ayez Kassar | Actor | 2011 | 1 | 1 |
| Kaas, Nikolaj, Lie | Nikolaj Lie Kaas | Actor | 2001 | 1 | 1 |
| Keir, Phillip | Phillip Keir | Director, Translator | 1984 | 2 | 1 |
| Kárová, Darina | Darina Kárová | Adaptation, Dramaturg | 1985 | 2 | 1 |
| Karajan, Isabel | Isabel Karajan | Actor | 1985 | 1 | 1 |
| Kavanagh, John | John Kavanagh | Actor | 1984 - 2011 | 3 | 1 |
| Kammer, Nancy-Elizabeth | Nancy-Elizabeth Kammer | Actor | 1990 | 1 | 1 |
| Kelly, David | David Kelly | Actor | 1989 - 1990 | 3 | 1 |
| Keeler, Dana | Dana Keeler | Actor | 1982 - 1990 | 2 | 1 |
| Kiefel, Russell | Russell Kiefel | Actor | 1988 - 1989 | 2 | 1 |
| Kjeld, Kristbjörg | Kristbjörg Kjeld | Actor | 1962 - 2011 | 4 | 1 |
| Kamnert, Kristina | Kristina Kamnert | Actor | 1992 - 1994 | 2 | 1 |
| Kaljuste, Ülle | Ülle Kaljuste | Actor | 1993 - 1999 | 2 | 1 |
| Kézdy, György | György Kézdy | Actor | 1965 - 1999 | 7 | 1 |
| Kelly, Daren | Daren Kelly | Actor | 1994 - 2001 | 3 | 1 |
| Kiepe, Marcus | Marcus Kiepe | Actor | 1994 - 2005 | 10 | 1 |
| Kahra, Kalevi | Kalevi Kahra | Actor | 1966 - 1980 | 4 | 1 |
| Kalezić, Milada | Milada Kalezić | Actor | 1994 - 2009 | 2 | 1 |
| Kačer, Jan | Jan Kačer | Actor, Adaptation, Director | 1993 - 1997 | 5 | 1 |
| Kreismann, Kersti | Kersti Kreismann | Actor | 1978 - 2010 | 6 | 1 |
| Kahn, Ian | Ian Kahn | Actor | 1996 | 1 | 1 |
| Kadow, Siegfried | Siegfried Kadow | Actor | 1996 - 2000 | 4 | 1 |
| Keck, Sandra | Sandra Keck | Actor | 1995 | 1 | 1 |
| Kellosalo, Annele | Annele Kellosalo | Actor | 1996 | 1 | 1 |
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