| Kabelák, Jiří | Jiří Kabelák | Actor | 1965 | 2 | |
| Kettner, Josef | Josef Kettner | Actor | 1965 | 1 | |
| Kníže, Jaroslav | Jaroslav Kníže | Actor | 1965 | 2 | |
| Křížková, Jitka | Jitka Křížková | Designer | 1965 | 1 | |
| Král, Jaroslav | Jaroslav Král | Adaptation, Dramaturg | 1965 - 1993 | 3 | |
| Keiser, Ann | Ann Keiser | Actor | 1965 | 1 | |
| Kóti, Árpád | Árpád Kóti | Actor | 1965 | 3 | |
| Kimmins, Kenneth | Kenneth Kimmins | Actor | 1965 | 1 | |
| Kelley, Hugh | Hugh Kelley | Actor | 1965 | 2 | |
| Kourey, Saundra | Saundra Kourey | Actor | 1965 | 1 | |
| Kourkoulos, Nikos | Nikos Kourkoulos | Actor | 1965 - 1979 | 3 | |
| Kontoulis, Giannis | Giannis Kontoulis | Actor | 1964 - 1975 | 3 | |
| Késmárky, Kálmán | Kálmán Késmárky | Actor | 1944 | 1 | |
| Kahlke, Erich | Erich Kahlke | Actor | 1965 | 1 | |
| Kastner, Péter | Péter Kastner | Designer | 1998 | 1 | |
| Kelemen, Csaba | Csaba Kelemen | Actor | 1998 | 1 | |
| Kascsák, Dóra | Dóra Kascsák | Actor | 1998 | 1 | |
| Kitamura, Kiyoji | Kiyoji Kitamura | Actor | 1997 | 1 | |
| Kala, Uta | Uta Kala | Costume Designer, Designer | 1997 | 2 | |
| Koch, Sebastian | Sebastian Koch | Actor | 1989 | 3 | |
| Kósa, Béla | Béla Kósa | Actor | 2005 | 2 | |
| Kövesdi, László | László Kövesdi | Actor | 2005 | 2 | |
| Kaszab, Anna | Anna Kaszab | Actor | 1925 - 1932 | 4 | |
| Kuohn, An | An Kuohn | Actor | 2000 - 2006 | 6 | |
| Klockow, Werner | Werner Klockow | Actor | 2001 - 2019 | 6 | |
| Kellosalo, Leena | Leena Kellosalo | Actor | 2002 | 1 | |
| Könyves, Erzsébet, Tóth | Erzsébet Tóth Könyves | Actor | 1933 | 1 | |
| Kolodziej, Andrea | Andrea Kolodziej | Actor | 2002 | 1 | |
| Kim, Peter | Peter Kim | Actor | 2002 | 1 | |
| King, Ryan | Ryan King | Actor | 2002 | 2 | |
| Kingsley, Mira | Mira Kingsley | Actor | 2002 | 1 | |
| Kohl, Gertrud | Gertrud Kohl | Actor | 2000 - 2009 | 3 | |
| Kistner, Georg | Georg Kistner | Dramaturg | 2002 | 1 | |
| Kránitz, Lajos | Lajos Kránitz | Actor | 2002 | 1 | |
| Kraushaar, Marie | Marie Kraushaar | Actor | 2002 | 1 | |
| Karl, Kristina | Kristina Karl | Actor | 2002 | 1 | |
| Kindred, Graham | Graham Kindred | Lighting Designer | 2001 - 2002 | 4 | |
| Klahr, Paul | Paul Klahr | Actor | 1901 | 1 | |
| Kucheran, Tamara Marie | Tamara Marie Kucheran | Costume Designer, Designer | 2002 | 2 | |
| Kajo, Irene | Irene Kajo | Actor | 2002 | 1 | |
| Kaila, Ilari | Ilari Kaila | Actor | 2002 | 1 | |
| Kuorikoski, Sorja | Sorja Kuorikoski | Costume Designer | 2002 | 1 | |
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