| Klockow, Werner | Werner Klockow | Actor | 2001 - 2019 | 6 | |
| Kloda, James | James Kloda | Actor, Lighting Designer | 2001 | 5 | |
| Klodiussen, Elisabeth Stokmo | Elisabeth Stokmo Klodiussen | Actor | 2010 | 1 | |
| Klodnitzky, Octav | Octav Klodnitzky | Actor | 1907 | 1 | |
| Kloeble, Alfons | Alfons Kloeble | Actor | 1923 - 1928 | 4 | |
| Kloempken, Tina | Tina Kloempken | Costume Designer | 2014 - 2016 | 2 | |
| Kloepfer, Martin | Martin Kloepfer | Adaptation, Director | 2005 | 2 | |
| Klöhn, André | André Klöhn | Actor | 1999 | 3 | |
| Kloiber, Ingeborg | Ingeborg Kloiber | Actor | 1963 | 1 | |
| Kloiber, Susanne | Susanne Kloiber | Costume Designer | 1981 - 1996 | 3 | |
| Kloke, Eberhard | Eberhard Kloke | Musical Director | 1975 | 1 | |
| Klokić, Abdulah | Abdulah Klokić | Actor | 1948 - 1956 | 2 | |
| Klokow, Till | Till Klokow | Actor | 1920 | 1 | |
| Klonis, Kleovoulos | Kleovoulos Klonis | Designer | 1933 - 1965 | 16 | |
| Klońska, Antonina | Antonina Klońska | Actor | 1913 | 1 | |
| Klooren, Marko | Marko Klooren | Actor | 1999 | 1 | |
| Klooren, Mati | Mati Klooren | Actor | 1962 - 1999 | 6 | |
| Kloos, Agatha | Agatha Kloos | Actor | 1975 | 1 | |
| Kloos, Andreas | Andreas Kloos | Director | 2016 | 1 | |
| Klootwijk, Ruud | Ruud Klootwijk | Actor, Designer, Producer | 2005 | 3 | |
| Klöpfer, Eugen | Eugen Klöpfer | Actor | 1914 - 1937 | 11 | 1 |
| Klopfer, Karol | Karol Klopfer | Designer | 1892 - 1900 | 2 | |
| Klöpfer, Mr. | Mr. Klöpfer | Actor | 1889 | 1 | |
| Klopfstock, Susanne | Susanne Klopfstock | Costume Designer, Designer | 1992 | 2 | |
| Klopp, Andreas | Andreas Klopp | Actor | 2009 - 2011 | 32 | 1 |
| Kloppers, Herman | Herman Kloppers | Actor | 1913 | 1 | |
| Klopsch, Erich | Erich Klopsch | Actor | 1901 | 1 | |
| Klopsch, Kurt | Kurt Klopsch | Director | 1945 | 1 | |
| Klos, Dieter | Dieter Klos | Choreographer | 1981 | 1 | |
| Klose, Marte | Marte Klose | Actor | 1956 | 1 | |
| Klose, Paul | Paul Klose | Actor | 1898 | 3 | |
| Kloska, Joseph | Joseph Kloska | Actor | 2006 | 1 | |
| Klosowski, Andreas | Andreas Klosowski | Designer | 1978 | 1 | |
| Kloss, Heinz | Heinz Kloss | Actor | 1999 | 1 | |
| Klossowski, Erich | Erich Klossowski | Costume Designer, Designer | 1915 | 2 | |
| Kloster, Matthew | Matthew Kloster | Actor | 2004 | 1 | 1 |
| Kloster, Ragna | Ragna Kloster | Actor, Choreographer, Dancer | 1928 | 3 | |
| Klostermann, Elisabeth | Elisabeth Klostermann | Actor | 1921 | 1 | |
| Klostermeier, Anneli | Anneli Klostermeier | Dramaturg | 2002 | 1 | |
| Klotsche, Martina | Martina Klotsche | Actor | 1981 | 1 | |
| Klotsotiras, Vasilis | Vasilis Klotsotiras (Βασίλης Κλωτσοτήρας) | Lighting Designer | 2023 | 1 | |
| Klott, Julius | Julius Klott | Actor | 1901 | 1 | |
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