| Kostadinov, Georgi | Georgi Kostadinov | Actor | 1997 | 1 | |
| Kostadinov, Kalin | Kalin Kostadinov | Actor | 2015 - 2016 | 2 | |
| Kostadinova, Hristina | Hristina Kostadinova | Actor | 1979 | 1 | |
| Kostakis, Iraklis | Iraklis Kostakis | Actor | 2005 | 2 | |
| Kostantaras, Lampros | Lampros Kostantaras | Actor | 1952 | 1 | |
| Kostecka, Oliver | Oliver Kostecka | Designer | 2004 | 2 | 1 |
| Kostecki, Wojciech | Wojciech Kostecki | Actor | 1973 | 1 | |
| Köstem, Şebnem | Şebnem Köstem (Sebnem Kostem) | Actor | 2012 | 1 | |
| Koster, Franz | Franz Koster | Actor | 1894 - 1908 | 4 | |
| Köster, Gundula | Gundula Köster | Actor | 1993 | 1 | |
| Köster, Liselotte | Liselotte Köster | Dancer | 1954 | 1 | |
| Koster, Quincy | Quincy Koster | Actor | 2011 | 1 | |
| Kosterka, Hugo | Hugo Kosterka | Translator | 1903 - 1947 | 5 | 1 |
| Kösters, David | David Kösters | Actor | 2024 | 1 | |
| Kösters, Johannes, M. | Johannes M. Kösters | Actor | 1996 | 1 | |
| Kostić, Deana | Deana Kostić | Actor | 1999 | 1 | |
| Kostić, Dunja | Dunja Kostić | Assistant Director | 2021 | 1 | |
| Kostić, Olivera | Olivera Kostić | Actor | 1979 | 1 | |
| Kostin, K.K. | K.K. Kostin | Designer | 1908 | 1 | |
| Kostina, K. | K. Kostina | Designer | 1918 | 1 | |
| Kostiv, Jacob | Jacob Kostiv | Actor | 2023 | 1 | |
| Kostka, Ant. | Ant. Kostka | Actor | 1941 | 1 | |
| Kostka, Jiří | Jiří Kostka | Actor | 1942 - 1966 | 3 | |
| Kostka, Petr | Petr Kostka | Actor | 1964 - 2016 | 8 | 1 |
| Kostková, A. | A. Kostková | Actor | 1941 | 1 | |
| Kostková, Zorka | Zorka Kostková | Actor | 2005 - 2006 | 2 | 1 |
| Köstlin, Karl | Karl Köstlin | Actor | 1911 - 1928 | 6 | |
| Köstlin, Reinhold | Reinhold Köstlin | Actor | 1923 | 1 | |
| Köstlinger, Maria | Maria Köstlinger | Actor | 2005 - 2023 | 6 | 6 |
| Kostolevskij, Igor | Igor Kostolevskij | Actor | 1999 - 2013 | 2 | |
| Kostolitz, Stefan | Stefan Kostolitz | Actor | 2010 | 1 | 1 |
| Kostopoulos, Chrysovalantis | Chrysovalantis Kostopoulos (Χρυσοβαλάντης Κωστόπουλος) | Actor | 2023 | 1 | |
| Kostopoulos, Lampros | Lampros Kostopoulos | Director | 1972 - 1989 | 4 | |
| Kostopoulos, Michalis | Michalis Kostopoulos | Actor | 1984 | 1 | |
| Kostopoulos, Nassos | Nassos Kostopoulos | Actor | 2003 | 1 | |
| Kostopoulou, Niovi | Niovi Kostopoulou | Actor | 2009 | 2 | |
| Kostorž, Jurij | Jurij Kostorž | Actor | 1986 - 1990 | 2 | |
| Kostousov, V. | V. Kostousov | Actor | 1987 | 1 | |
| Kostov, Dimitar | Dimitar Kostov | Actor | 1976 | 1 | |
| Kostov, Dušan | Dušan Kostov (Душан Костов) | Actor | 1983 | 1 | |
| Kostov, Risto | Risto Kostov (Ристо Костов) | Actor | 1983 | 1 | |
| Kostov, Vasil | Vasil Kostov (Васил Костов) | Designer | 1968 | 1 | |
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