| Klein, Lotte, | Lotte Klein | Actor | 1911 – 1912 | 4 | |
| König, Elisabeth, | Elisabeth König | Actor | 1911 – 1913 | 3 | |
| Kubitz, Dora, | Dora Kubitz | Actor | 1913 | 1 | |
| Kießling, Johanna, | Johanna Kießling | Actor | 1912 | 1 | |
| Krüger-Michaelis, Melanie, | Melanie Krüger-Michaelis | Actor | 1913 | 1 | |
| Keller, Rudolf, | Rudolf Keller | Actor | 1913 | 1 | |
| Kempin, Kurt, | Kurt Kempin | Designer | 1913 | 12 | |
| Kuenzer, Adolf, | Adolf Kuenzer | Actor | 1913 | 1 | |
| Kräger, August, | August Kräger | Actor | 1913 | 1 | |
| Kroczak, Emil, | Emil Kroczak | Actor | 1913 | 4 | |
| Keller, Lilli, | Lilli Keller | Actor | 1913 | 1 | |
| Karchow, Ernst Günther, | Ernst Günther Karchow | Actor | 1913 | 4 | |
| Kernic, Anka, | Anka Kernic | Actor | 1909 – 1918 | 6 | |
| Kramer, Ernst, | Ernst Kramer | Actor | 1913 – 1914 | 2 | |
| Kiefer, Frieda, | Frieda Kiefer | Actor | 1913 – 1914 | 2 | |
| Kalbeck, Paul, | Paul Kalbeck | Actor, Director | 1913 | 2 | |
| Knelke, Gerte, | Gerte Knelke | Actor | 1913 | 1 | |
| Klein-Rohden, Rudolf , | Rudolf Klein-Rohden | Actor | 1898 – 1914 | 5 | |
| Kessell, Nanny, | Nanny Kessell | Actor | 1914 | 1 | |
| Kiesau, Georg, | Georg Kiesau | Actor, Director | 1914 | 7 | |
| Keppler, Ernst, | Ernst Keppler | Actor | 1919 | 3 | |
| Kuhn, Marga, | Marga Kuhn | Actor | 1914 | 1 | |
| Krause, Mila, | Mila Krause | Actor | 1914 | 1 | |
| Kraus, Hans Adalbert, | Hans-Adalbert Kraus (Hans Adalbert Kraus) | Actor | 1932 | 6 | |
| Köllner, Herbert, | Herbert Köllner | Actor | 1914 | 2 | |
| Koßwig, Curt, | Curt Koßwig | Actor | 1914 | 2 | |
| Krause, Charlotte, | Charlotte Krause | Actor | 1914 | 5 | |
| Koch, Maria, | Maria Koch | Actor | 1913 – 1916 | 2 | |
| Krauß, Ingo, | Ingo Krauß | Actor, Director | 1906 – 1908 | 7 | |
| Keßler, Hugo, | Hugo Keßler | Actor | 1915 | 5 | |
| Kaufmann, Martha, | Martha Kaufmann | Actor | 1915 – 1918 | 3 | |
| Körner, Lothar, | Lothar Körner | Actor | 1915 – 1925 | 26 | |
| König, Gisela, | Gisela König | Actor | 1917 | 3 | |
| Kahle, Elisabeth, | Elisabeth Kahle | Actor | 1915 | 2 | |
| Klinder, Lotte, | Lotte Klinder | Actor | 1915 | 1 | |
| Kirchberger, Leo, | Leo Kirchberger | Actor | 1915 | 2 | |
| Kleiner, Oskar, | Oskar Kleiner | Actor | 1915 | 1 | |
| Kämmerer, Karl, | Karl Kämmerer | Actor | 1915 | 1 | |
| Kaiser, Lola, | Lola Kaiser | Actor | 1915 | 1 | |
| Korb, Ludwig, | Ludwig Korb | Actor | 1915 | 2 | |
| Keßler, Eva, | Eva Keßler | Actor | 1915 | 1 | |
| Klossowski, Erich, | Erich Klossowski | Costume Designer, Designer | 1915 | 2 | |
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