| 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 | |
| Kennedy, George | George Kennedy | Actor | 1951 - 1958 | 2 | |
| Krastel, Josef | Josef Krastel | Director | 1936 - 1958 | 2 | |
| Kemetmüller, Willi | Willi Kemetmüller | Actor | 1958 | 2 | |
| Kollhammer, Eveline | Eveline Kollhammer | Actor, Dancer | 1958 - 1962 | 2 | |
| Katsadramis, Thodoros | Thodoros Katsadramis | Actor | 1956 | 2 | |
| Kollmann, Ingeborg | Ingeborg Kollmann | Actor, Dancer | 1956 | 2 | |
| Kayssler, Christine | Christine Kayssler | Actor | 1956 - 1971 | 2 | |
| Kapeleris, Giannis | Giannis Kapeleris | Actor | 2013 - 2018 | 2 | |
| Kleiber, Walter | Walter Kleiber | Dancer | 1956 | 2 | |
| Karter, Egon | Egon Karter | Director | 1956 | 2 | |
| Knippenberg, Herbert, A. | Herbert A. Knippenberg | Actor | 1956 | 2 | |
| Köck, Eduard | Eduard Köck | Actor, Director | 1916 - 1920 | 2 | |
| Krisztik, Csaba | Csaba Krisztik | Actor | 2012 - 2013 | 2 | |
| Kramer-Johansen, Randi | Randi Kramer-Johansen | Choreographer | 1955 - 1956 | 2 | 1 |
| Kitagawa, Isamu | Isamu Kitagawa | Designer | 1955 - 1956 | 2 | |
| Kagias, Chrysanthos | Chrysanthos Kagias | Actor | 2013 | 2 | |
| Kjelle, Ragnvald | Ragnvald Kjelle | Actor | 1953 - 1954 | 2 | |
| Katz, Bernice | Bernice Katz | Actor | 1951 - 1952 | 2 | |
| Kraus, Sidney | Sidney Kraus | Actor | 1951 - 1952 | 2 | |
| Korsholm, Gisela | Gisela Korsholm | Actor | 1952 - 1954 | 2 | |
| Kurth, Henry | Henry Kurth | Designer, Lighting Designer | 1951 | 2 | |
| Kindler, Klaus | Klaus Kindler | Actor | 1954 | 2 | |
| Koffmane, Robert | Robert Koffmane | Actor | 1954 | 2 | |
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