| Klöpfer, Mr. | Mr. Klöpfer | Actor | 1889 | 1 | |
| Klopfer, Karol | Karol Klopfer | Designer | 1892 - 1900 | 2 | |
| Klöpfer, Eugen | Eugen Klöpfer | Actor | 1914 - 1937 | 11 | 1 |
| Klootwijk, Ruud | Ruud Klootwijk | Actor, Designer, Producer | 2005 | 3 | |
| Kloos, Andreas | Andreas Kloos | Director | 2016 | 1 | |
| Kloos, Agatha | Agatha Kloos | Actor | 1975 | 1 | |
| Klooren, Mati | Mati Klooren | Actor | 1962 - 1999 | 6 | |
| Klooren, Marko | Marko Klooren | Actor | 1999 | 1 | |
| Klońska, Antonina | Antonina Klońska | Actor | 1913 | 1 | |
| Klonis, Kleovoulos | Kleovoulos Klonis | Designer | 1933 - 1965 | 16 | |
| Klokow, Till | Till Klokow | Actor | 1920 | 1 | |
| Klokić, Abdulah | Abdulah Klokić | Actor | 1948 - 1956 | 2 | |
| Kloke, Eberhard | Eberhard Kloke | Musical Director | 1975 | 1 | |
| Kloiber, Susanne | Susanne Kloiber | Costume Designer | 1981 - 1996 | 3 | |
| Kloiber, Ingeborg | Ingeborg Kloiber | Actor | 1963 | 1 | |
| Klöhn, André | André Klöhn | Actor | 1999 | 3 | |
| Kloepfer, Martin | Martin Kloepfer | Adaptation, Director | 2005 | 2 | |
| Kloempken, Tina | Tina Kloempken | Costume Designer | 2014 - 2016 | 2 | |
| Kloeble, Alfons | Alfons Kloeble | Actor | 1923 - 1928 | 4 | |
| Klodnitzky, Octav | Octav Klodnitzky | Actor | 1907 | 1 | |
| Klodiussen, Elisabeth Stokmo | Elisabeth Stokmo Klodiussen | Actor | 2010 | 1 | |
| Kloda, James | James Kloda | Actor, Lighting Designer | 2001 | 5 | |
| Klockow, Werner | Werner Klockow | Actor | 2001 - 2019 | 6 | |
| Klockow, Till | Till Klockow | Actor | 1930 | 1 | |
| Klockars, Kristina | Kristina Klockars | Actor | 1974 | 1 | |
| Klobučar, Hrvoje | Hrvoje Klobučar | Actor | 2010 | 1 | |
| Kljaić-Radaković, Milica | Milica Kljaić-Radaković | Actor | 1978 | 1 | |
| Kljaić-Radaković, Milica | Milica Kljaić-Radaković | Actor | 1984 | 1 | |
| Klix, Rudolf | Rudolf Klix | Actor | 1924 - 1932 | 2 | |
| Klitsch, Wilhelm | Wilhelm Klitsch | Actor | 1923 | 1 | |
| Klitsch, Gustav | Gustav Klitsch | Actor | 2012 | 1 | |
| Klitsch, Edgar | Edgar Klitsch | Actor | 1919 | 1 | |
| Kliszewski, Antoni | Antoni Kliszewski | Actor | 1903 - 1906 | 2 | |
| Klischke, Thomas | Thomas Klischke | Assistant Director | 2005 | 1 | |
| Klischat, Christian | Christian Klischat | Actor | 2016 | 1 | |
| Klischat, Antonie | Antonie Klischat | Actor | 1923 | 1 | |
| Klisch, Gerhard | Gerhard Klisch | Actor | 1973 | 1 | |
| Kliščevskaja, E. | E. Kliščevskaja | Actor | 1990 | 1 | |
| Klipstein, Ernst Vollrath v. | Ernst Vollrath v. Klipstein | Actor | 1932 - 1963 | 2 | |
| Klippel, Fritz | Fritz Klippel | Actor | 1925 - 1934 | 2 | |
| Klippel, Friedrich | Friedrich Klippel | Actor | 1933 - 1934 | 2 | |
| Klipmann, Poul | Poul Klipmann | Dancer | 1961 | 1 | |
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