| Kostopoulos, Chrysovalantis | Chrysovalantis Kostopoulos (Χρυσοβαλάντης Κωστόπουλος) | Actor | 2023 | 1 | |
| Kostolitz, Stefan | Stefan Kostolitz | Actor | 2010 | 1 | 1 |
| Kostolevskij, Igor | Igor Kostolevskij | Actor | 1999 - 2013 | 2 | |
| Köstlinger, Maria | Maria Köstlinger | Actor | 2005 - 2023 | 6 | 6 |
| Köstlin, Reinhold | Reinhold Köstlin | Actor | 1923 | 1 | |
| Köstlin, Karl | Karl Köstlin | Actor | 1911 - 1928 | 6 | |
| Kostková, Zorka | Zorka Kostková | Actor | 2005 - 2006 | 2 | 1 |
| Kostková, A. | A. Kostková | Actor | 1941 | 1 | |
| Kostka, Petr | Petr Kostka | Actor | 1964 - 2016 | 8 | 1 |
| Kostka, Jiří | Jiří Kostka | Actor | 1942 - 1966 | 3 | |
| Kostka, Ant. | Ant. Kostka | Actor | 1941 | 1 | |
| Kostiv, Jacob | Jacob Kostiv | Actor | 2023 | 1 | |
| Kostina, K. | K. Kostina | Designer | 1918 | 1 | |
| Kostin, K.K. | K.K. Kostin | Designer | 1908 | 1 | |
| Kostić, Olivera | Olivera Kostić | Actor | 1979 | 1 | |
| Kostić, Dunja | Dunja Kostić | Assistant Director | 2021 | 1 | |
| Kostić, Deana | Deana Kostić | Actor | 1999 | 1 | |
| Kösters, Johannes, M. | Johannes M. Kösters | Actor | 1996 | 1 | |
| Kosterka, Hugo | Hugo Kosterka | Translator | 1903 - 1947 | 5 | 1 |
| Koster, Quincy | Quincy Koster | Actor | 2011 | 1 | |
| Köster, Liselotte | Liselotte Köster | Dancer | 1954 | 1 | |
| Köster, Gundula | Gundula Köster | Actor | 1993 | 1 | |
| Koster, Franz | Franz Koster | Actor | 1894 - 1908 | 4 | |
| Köstem, Şebnem | Şebnem Köstem (Sebnem Kostem) | Actor | 2012 | 1 | |
| Kostecki, Wojciech | Wojciech Kostecki | Actor | 1973 | 1 | |
| Kostecka, Oliver | Oliver Kostecka | Designer | 2004 | 2 | 1 |
| Kostantaras, Lampros | Lampros Kostantaras | Actor | 1952 | 1 | |
| Kostakis, Iraklis | Iraklis Kostakis | Actor | 2005 | 2 | |
| Kostadinova, Hristina | Hristina Kostadinova | Actor | 1979 | 1 | |
| Kostadinov, Kalin | Kalin Kostadinov | Actor | 2015 - 2016 | 2 | |
| Kostadinov, Georgi | Georgi Kostadinov | Actor | 1997 | 1 | |
| Koßwig, Curt | Curt Koßwig | Actor | 1914 | 2 | |
| Kossowsky, Jorge | Jorge Kossowsky | Assistant Director, Director | 1952 - 1956 | 3 | |
| Kossovsky, Sylvia | Sylvia Kossovsky | Actor | 1934 | 1 | |
| Kossi, Enrique | Enrique Kossi | Actor | 1972 | 1 | |
| Kossegg, Therese | Therese Kossegg | Actor | 1907 - 1928 | 4 | |
| Kosse, Grit | Grit Kosse | Mask Maker | 1994 | 1 | |
| Kosowski, Zbigniew | Zbigniew Kosowski | Actor | 2015 - 2016 | 10 | |
| Kosová, Eliška | Eliška Kosová | Designer | 2006 | 1 | |
| Kosolosky, Ludovic | Ludovic Kosolosky | Actor | 2007 | 1 | |
| Kosofsky, Martin, I. | Martin I. Kosofsky | Actor | 1949 | 1 | |
| Kosock, David | David Kosock | Actor | 1999 | 1 | |
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