| Kurucz, András | András Kurucz | Designer | | 1 | |
| Kavanagh , Aoife | Aoife Kavanagh | Sound Designer | 2023 | 1 | |
| Kara, Seleb | Seleb Kara | Director | 2023 | 1 | |
| Kais, Adam | Adam Kais | | | | |
| Kragseth, Rolf | Rolf Kragseth | Actor | 2023 | 1 | |
| Kummrow, Anna Elisabeth | Anna Elisabeth Kummrow | Actor | 2023 | 1 | |
| Kostiv, Jacob | Jacob Kostiv | Actor | 2023 | 1 | |
| Kudah, Asger | Asger Kudah | Lighting Designer | 2023 | 1 | |
| Kraemer, Gabriela | Gabriela Kraemer | Director | 2023 | 1 | |
| Katris, Zack | Zack Katris | Actor | 2023 | 1 | |
| Kennedy, Nick | Nick Kennedy | Actor | 2023 | 1 | |
| Khodr, Chrystèle | Chrystèle Khodr | Adaptation, Director, Playwright | 2023 - 2024 | 8 | |
| Kreig, Raúl | Raúl Kreig | Actor | 2023 | 1 | |
| Kirk, Will | Will Kirk | Actor | 2023 | 1 | |
| Kidd, Anna | Anna Kidd | Sound Designer | 2023 | 1 | |
| Kempkes, Peter | Peter Kempkes | Actor | 2023 | 1 | |
| Kern, Christian | Christian Kern | | | | |
| Kuchin, Nikolai | Nikolai Kuchin | Stage Manager | 2023 | 1 | |
| Kiala, Para | Para Kiala | Actor | 2023 | 1 | |
| Ko, Tiffany | Tiffany Ko | Stage Manager | 2023 | 1 | |
| Kreißl, Cyrill | Cyrill Kreißl | Set Designer | 2023 | 1 | |
| Kocmanová, Petra | Petra Kocmanová | Actor | 2023 | 1 | |
| Khan, Qasim | Qasim Khan | Actor | 2024 | 1 | |
| Kagen, Patrick | Patrick Kagen | Actor | 2023 | 1 | |
| Kelln, Mya | Mya Kelln | Director | 2023 | 1 | |
| Kowalski, Julia | Julia Kowalski | Actor | 2023 | 1 | |
| Kazantsev, Denis | Denis Kazantsev (Денис Казанцев) | Actor | 2021 | 1 | |
| Kallset, Jo | Jo Kallset | Actor | 2023 | 1 | |
| Karimi, Niki | Niki Karimi | Actor | 1993 | 1 | 1 |
| King, Dennis | Dennis King | Actor | 1937 - 1938 | 7 | 1 |
| Kúnos, László | László Kúnos | Translator | 1991 - 2019 | 55 | 1 |
| Kjærulff-Schmidt, Palle | Palle Kjærulff-Schmidt | Director | 1974 - 2000 | 2 | 1 |
| Kowalski, Władysław | Władysław Kowalski | Actor | 1972 - 2006 | 9 | 1 |
| Kromminga, Katharina | Katharina Kromminga | Costume Designer | 2002 - 2017 | 8 | 1 |
| Klöpfer, Eugen | Eugen Klöpfer | Actor | 1914 - 1937 | 11 | 1 |
| Kapeljus, Emil Borosovich | Emil Borosovich Kapeljus | Costume Designer, Designer | 2003 - 2008 | 5 | 1 |
| Kucharesin, Valerij | Valerij Kucharesin | Actor | 2003 - 2006 | 2 | 1 |
| Kovanko, Lilga | Lilga Kovanko | Actor | 1977 - 1978 | 2 | 1 |
| Kirshenbaum, Debra | Debra Kirshenbaum | Actor | 2006 | 1 | 1 |
| Koschitz, Julia | Julia Koschitz | Actor | 2006 | 3 | 1 |
| Kahn, Michael | Michael Kahn | Director | 1979 - 2001 | 4 | 1 |
| Kaitue, Katariina | Katariina Kaitue | Actor | 2002 - 2007 | 2 | 1 |
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