| Kay, Alison | Alison Kay | Actor | 1964 | 1 | |
| Knapp, Terence | Terence Knapp | Actor | 1964 - 1965 | 5 | |
| Kraus, Willy | Willy Kraus | Actor | 1964 | 1 | |
| Kashimura, Msako | Msako Kashimura | Costume Designer | 1964 | 1 | |
| Kraft, Stefan | Stefan Kraft | Director | 2015 | 1 | |
| Karjala, Jodi | Jodi Karjala | Costume Designer, Designer | 2011 - 2017 | 3 | |
| Kovačević, Goran | Goran Kovačević | Musician | 2016 | 1 | |
| Kreipe, Kim Tassia | Kim Tassia Kreipe | Dancer | 2016 | 1 | |
| Kennon, Angelina Reyes | Angelina Reyes Kennon | Actor | 2011 | 1 | |
| Kennon, Grant | Grant Kennon | Actor | 2011 | 1 | |
| Kingsland, Robin | Robin Kingsland | Actor | 2011 - 2022 | 11 | |
| Kelly, Sean | Sean Kelly | Actor | 2011 | 1 | |
| Klett, Marcel | Marcel Klett | Dramaturg | 2011 | 2 | |
| Krake, Nina | Nina Krake | Actor | 2011 | 1 | |
| Kalodiki, Georgia | Georgia Kalodiki | Composer, Sound Designer | 2012 | 2 | |
| Kim, Ji-yeon | Ji-yeon Kim | Costume Designer | 2012 | 1 | |
| Kim, Chang-Key | Chang-Key Kim | Lighting Designer | 2012 | 1 | |
| Kim, Miy-he | Miy-he Kim | Translator | 2012 | 1 | |
| Kim, Soo-hyun | Soo-hyun Kim | Actor | 2012 | 1 | |
| Kang, Ae-sim | Ae-sim Kang | Actor | 2012 | 1 | |
| Kim, Sung-mee | Sung-mee Kim | Actor | 2012 | 1 | |
| Kim, Jeong-ho | Jeong-ho Kim | Actor | 2012 | 1 | |
| Krestel, Anna | Anna Krestel | Actor | 2016 | 1 | |
| Kloos, Andreas | Andreas Kloos | Director | 2016 | 1 | |
| Kiefer, Melina | Melina Kiefer | Actor | 2012 | 4 | |
| Kuhls, Thessy | Thessy Kuhls | Actor | 1961 - 1964 | 2 | |
| Knuth, Bodo | Bodo Knuth | Actor | 1964 | 1 | |
| Kaipf, Gerda | Gerda Kaipf | Actor | 1964 | 1 | |
| Keshavarz, Mohammad Ali | Mohammad Ali Keshavarz | Actor | 1964 | 1 | |
| Karel, Mike | Mike Karel | Actor | 1964 | 3 | |
| Koch, Eik | Eik Koch | Actor, Director | 1956 - 1964 | 2 | |
| Keller, Gert | Gert Keller | Director | 1964 | 1 | |
| Köhnke, Horst | Horst Köhnke | Actor | 1964 | 1 | |
| Koppel, Herman, D. | Herman D. Koppel | Composer, Conductor | 1964 | 2 | |
| Kløvtvedt, Kaare | Kaare Kløvtvedt | Actor | 1962 - 1963 | 58 | |
| Knight, Alan | Alan Knight | Actor | 1963 | 1 | |
| Karantzas, Dimitris | Dimitris Karantzas (Δημήτρης Καραντζάς) | Director | 2012 - 2025 | 3 | |
| Koukios, Thymios | Thymios Koukios | Actor | 2012 | 1 | |
| Kropf, Robert | Robert Kropf | Actor, Adaptation, Designer, Director | 2012 - 2017 | 5 | |
| Kozar, Daniel | Daniel Kozar | Costume Designer | 2012 | 1 | |
| Kerbel, Jens | Jens Kerbel | Director | 2012 | 1 | |
| Karkoff, Maurice | Maurice Karkoff | Composer | 1963 | 1 | |
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