| Klykov, Vladimir | Vladimir Klykov | Sound Designer | 2017 - 2019 | 9 | |
| Kovács, Kinga | Kinga Kovács | Assistant Director | 2017 - 2019 | 9 | |
| Kennedy, Gary | Gary Kennedy | Actor | 1971 | 1 | |
| Kernan, Alvin | Alvin Kernan | Actor | 1971 | 1 | |
| Kessler, Evelyn | Evelyn Kessler | Actor | 1971 | 1 | |
| Kratz, Monika | Monika Kratz | Costume Designer | 1971 - 1976 | 2 | |
| Koepke, Ewald | Ewald Koepke | Actor | 1971 | 1 | |
| Karagiorgis, Klearchos | Klearchos Karagiorgis | Director | 1971 - 1973 | 2 | |
| Karatzas, Nikos | Nikos Karatzas | Actor | 1971 | 1 | |
| Kafkaridis, Vladimiros | Vladimiros Kafkaridis | Actor | 1973 | 7 | |
| Kaulfuss, Uta | Uta Kaulfuss | Dramaturg | 1973 | 1 | |
| Kay, Madge | Madge Kay | Actor | 1909 | 1 | |
| Klisch, Gerhard | Gerhard Klisch | Actor | 1973 | 1 | |
| Kanic, Marko, Iversen | Marko Iversen Kanic | Actor | 2017 - 2018 | 2 | |
| Kuehner, Jody | Jody Kuehner | Actor, Adaptation | 2017 | 2 | |
| Kelly, Reade | Reade Kelly | Actor | 2017 | 1 | |
| Kemp, Kevin | Kevin Kemp | Actor | 2017 | 1 | |
| Keir, Kalen | Kalen Keir | Sound Designer | 2017 | 1 | |
| Karlsen, Per | Per Karlsen | Mask Maker | 1976 - 1979 | 2 | |
| Kettunen, Arne | Arne Kettunen | Actor | 1976 - 1978 | 2 | |
| Knudtzon, Kristin, Thesen | Kristin Thesen Knudtzon | Actor | 1976 | 1 | |
| Koppel, Einari | Einari Koppel | Actor | 1976 | 1 | |
| Kettner, Gisela | Gisela Kettner | Actor | 1976 | 2 | |
| Keiding, Anders | Anders Keiding | Composer | 1976 | 1 | |
| Knorr, Marianne | Marianne Knorr | Actor | 1976 | 1 | |
| Köksal, Yusuf | Yusuf Köksal (Yusuf Koksal) | Actor | 2012 | 1 | |
| Kraft, Martine | Martine Kraft | Actor, Composer | 2006 - 2012 | 6 | |
| Klein, Manuel | Manuel Klein | Actor | 2015 - 2017 | 28 | |
| Kayan, Sabih | Sabih Kayan | Costume Designer, Designer | 1956 | 2 | |
| Kurtoğlu, Haluk | Haluk Kurtoğlu | Actor | 1956 | 1 | |
| Kind, Richard | Richard Kind | Actor | 2014 | 1 | |
| Krabbe, Barbara | Barbara Krabbe | Actor | 1976 | 1 | |
| Kann, Pelle, Nordhøj | Pelle Nordhøj Kann | Actor, Director | 2015 - 2018 | 7 | |
| Korsbæk, Nadia, Nabil | Nadia Nabil Korsbæk | Designer | 2013 | 1 | |
| Kold, Laura | Laura Kold | Actor | 2014 | 1 | |
| Keene, James | James Keene | Actor | 2017 | 1 | |
| Knight-Adams, Marcus | Marcus Knight-Adams | Costume Designer | 2016 | 1 | |
| Karaca, Ali | Ali Karaca | Actor | 2017 | 1 | |
| Kılınç, Sinem | Sinem Kılınç (Sinem Kilinc) | Costume Designer | 2017 | 1 | |
| Kochanovsky, Zafrir | Zafrir Kochanovsky | Actor | 1977 | 1 | |
| Kean, Marie | Marie Kean | Actor | 1977 | 1 | |
| Kain, Christine | Christine Kain | Actor | 1977 | 5 | |
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