| Klaws, Arwid | Arwid Klaws | Actor | 2014 - 2024 | 2 | |
| Khuon, Alexander | Alexander Khuon | Actor | 2013 | 2 | 1 |
| Kittel, Hank, Irwin | Hank Irwin Kittel | Designer | 2014 - 2017 | 2 | |
| Kaczmarek, Jürgen | Jürgen Kaczmarek | Actor | 2000 - 2016 | 2 | |
| Kubin, Anna | Anna Kubin | Actor | 2013 - 2022 | 2 | 1 |
| Keil, Esther | Esther Keil | Actor | 2011 | 2 | 4 |
| Kittel, Marianne | Marianne Kittel | Actor | 2011 | 2 | 1 |
| Kaback, Doug | Doug Kaback | Adaptation, Director | 2012 | 2 | |
| Krenus, Filip | Filip Krenus | Actor | 2009 - 2012 | 2 | |
| Klett, Marcel | Marcel Klett | Dramaturg | 2011 | 2 | |
| Kalodiki, Georgia | Georgia Kalodiki | Composer, Sound Designer | 2012 | 2 | |
| Kuhls, Thessy | Thessy Kuhls | Actor | 1961 - 1964 | 2 | |
| Koppenhöfer, Charlotte | Charlotte Koppenhöfer | Director | 2013 - 2016 | 2 | 1 |
| Koch, Eik | Eik Koch | Actor, Director | 1956 - 1964 | 2 | |
| Koppel, Herman, D. | Herman D. Koppel | Composer, Conductor | 1964 | 2 | |
| Karantzas, Dimitris | Dimitris Karantzas | Director | 2012 - 2016 | 2 | |
| Kidwell, Erin | Erin Kidwell | Actor | 2016 - 2020 | 2 | |
| Kling, Kris | Kris Kling | Actor | 2013 - 2016 | 2 | |
| Keene, Jay, B. | Jay B. Keene | Designer, Lighting Designer | 1963 | 2 | |
| Kudakwashe, Michael | Michael Kudakwashe | Actor | 2015 - 2016 | 2 | |
| Kieling, Wolfgang | Wolfgang Kieling | Actor | 1963 - 1964 | 2 | |
| Keating, Charles | Charles Keating | Actor | 1962 - 1963 | 2 | |
| Keats, Viola | Viola Keats | Actor | 1962 | 2 | 1 |
| Keim-Strauß, Anni | Anni Keim-Strauß | Costume Designer | 1951 - 1962 | 2 | |
| Koettenich, Hans, M. | Hans M. Koettenich | Actor | 1960 - 1961 | 2 | |
| Kraft, Holger | Holger Kraft | Actor | 2011 - 2017 | 2 | |
| Kwei-Armah, Kwame | Kwame Kwei-Armah | Director | 2012 - 2017 | 2 | 1 |
| Kotelenets, Heather | Heather Kotelenets | Actor | 2012 | 2 | |
| Kilps, Thomas | Thomas Kilps | Actor | 2012 | 2 | |
| Krumm, Paul-Albert | Paul-Albert Krumm | Adaptation, Director | 1961 | 2 | |
| Kimmelman, Vladimir | Vladimir Kimmelman | Actor, Producer | 2012 - 2022 | 2 | 3 |
| Kerkhoff, Marie Luisa | Marie Luisa Kerkhoff | Actor | 2016 - 2022 | 2 | |
| Kittelsaa Vesaas, Sigrid Marie | Sigrid Marie Kittelsaa Vesaas | Actor, Dancer | 2016 - 2018 | 2 | |
| Koivu, Neil | Neil Koivu | Lighting Designer | 2011 - 2019 | 2 | |
| Kelly, John | John Kelly | Lighting Designer | 2011 - 2018 | 2 | |
| Kawanishi, Mari | Mari Kawanishi | Actor | 2011 | 2 | |
| Kumar, Godaan | Godaan Kumar | Actor | 2016 - 2017 | 2 | |
| Kocsis, Gergely | Gergely Kocsis | Actor | 2016 - 2019 | 2 | |
| Kovács, Ferenc | Ferenc Kovács | Designer | 1974 | 2 | 1 |
| Kuhn, Gisela | Gisela Kuhn | Lighting Designer, Sound Designer | 2013 | 2 | |
| Krogh, Jørgen | Jørgen Krogh | Actor | 1959 | 2 | |
| Köbrich, Günter | Günter Köbrich | Actor | 1959 | 2 | |
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