| Karacaoğlu, Toron | Toron Karacaoğlu | Actor | 1956 | 1 | |
| Kıpçak, Kâni | Kâni Kıpçak | Actor | 1956 | 1 | |
| Karakaya, Feridun | Feridun Karakaya | Actor | 1956 | 1 | |
| Külekçi, Fatma | Fatma Külekçi | Dancer | 1956 | 1 | |
| Kitajchuk, John | John Kitajchuk | Actor | 1956 | 1 | |
| Kayan, Sabih | Sabih Kayan (Sabih Kayan) | Costume Designer, Designer | 1956 | 2 | |
| Kurtoğlu, Haluk | Haluk Kurtoğlu (Haluk Kurtoglu) | Actor | 1956 | 1 | |
| Kauzlarić, Vesna | Vesna Kauzlarić | Director | 1956 | 1 | |
| Kraljević, Ante | Ante Kraljević | Actor | 1956 | 1 | |
| Knoop, Eva | Eva Knoop | Actor | 1956 - 1957 | 28 | |
| Kreihanslová, Hana | Hana Kreihanslová | Actor | 1956 - 1958 | 2 | |
| Kaps-Zurmahr, Helmut | Helmut Kaps-Zurmahr | Actor | 1956 - 1959 | 2 | |
| Karsten, Fred | Fred Karsten | Actor | 1956 - 1963 | 3 | |
| Koch, Eik | Eik Koch | Actor, Director | 1956 - 1964 | 2 | |
| Knaus, Walter | Walter Knaus | Director | 1956 - 1965 | 2 | |
| Kothe, Manfred | Manfred Kothe | Actor | 1956 - 1966 | 2 | |
| Kaplanová, Valerie | Valerie Kaplanová | Actor | 1956 - 1967 | 3 | |
| Kazarska, Stefka | Stefka Kazarska | Actor | 1956 - 1971 | 2 | |
| Kayssler, Christine | Christine Kayssler | Actor | 1956 - 1971 | 2 | |
| Kalbeck, Florian | Florian Kalbeck | Adaptation, Translator | 1956 - 1972 | 5 | |
| Kopunović, Geza | Geza Kopunović | Actor | 1956 - 1972 | 2 | |
| Kovačević, Eržika | Eržika Kovačević | Actor | 1956 - 1972 | 2 | |
| Kemper, Nina | Nina Kemper | Costume Designer | 1956 - 1973 | 2 | |
| Karzau, Sonja | Sonja Karzau | Actor | 1956 - 1974 | 4 | |
| Konstantopoulos, Spyros | Spyros Konstantopoulos | Actor | 1956 - 1979 | 2 | |
| Kistner, Bert | Bert Kistner | Costume Designer, Designer | 1956 - 1985 | 5 | |
| Kappel, Günter | Günter Kappel | Costume Designer | 1956 - 1985 | 3 | |
| Krogh, Guy | Guy Krogh | Designer | 1956 - 1988 | 3 | |
| Kjærulff-Schmidt, Helge | Helge Kjærulff-Schmidt | Actor | 1956 - 2003 | 4 | |
| Kozak, Bogusław | Bogusław Kozak | Actor | 1957 | 1 | |
| Krüger-Halden, Walpurgis | Walpurgis Krüger-Halden | Actor | 1957 | 1 | |
| Kirschenstein, Ch. | Ch. Kirschenstein | Translator | 1957 | 1 | |
| Kolstad, Gjertrud, | Gjertrud Kolstad | Actor | 1957 | 1 | |
| Kisum, William | William Kisum | Actor | 1957 | 1 | |
| Krumenacher, Fritz | Fritz Krumenacher | Designer | 1957 | 1 | |
| Kyselý, Rudolf | Rudolf Kyselý | Actor | 1957 | 1 | |
| Kneis, František | František Kneis | Actor | 1957 | 1 | |
| Kovář, Čestmír | Čestmír Kovář | Actor, Director | 1957 | 2 | |
| Kadrnožka, Dimitrij | Dimitrij Kadrnožka | Designer | 1957 | 1 | |
| Kadrnožková, Zdeňka | Zdeňka Kadrnožková | Costume Designer | 1957 | 1 | |
| Kosinski, Jan | Jan Kosinski | Designer | 1957 | 1 | |
| Krzemiński , Władysław | Władysław Krzemiński | Director | 1957 | 1 | |
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