| Kronacher, Dr. Alwin, | Alwin Kronacher (Dr. Alwin Kronacher) | Director | 1911 - 1925 | 9 | |
| Knuth, Gustav, | Gustav Knuth | Actor | 1924 - 1964 | 9 | |
| Krastev, Dr. Krastjo, | Krastjo Krastev (Dr. Krastjo Krastev) | Actor, Translator | 1905 - 1996 | 9 | |
| Kingdon, Frank, | Frank Kingdon | Actor | 1906 - 1907 | 9 | |
| Kristiansen, Thor Inge, | Thor Inge Kristiansen | Actor | 1949 - 1974 | 9 | |
| Kent, Jonathan, | Jonathan Kent | Actor, Director | 1977 - 2019 | 9 | |
| Korstad, Liv Jorunn, | Liv Jorunn Korstad | Actor | 1994 - 2001 | 9 | |
| Krook, Margaretha, | Margaretha Krook | Actor | 1950 - 1997 | 9 | |
| Kosmo, Ingebjørg, | Ingebjørg Kosmo | Actor | 2001 - 2014 | 9 | |
| Kolaas, Harald, | Harald Kolaas | Actor | 2009 - 2015 | 9 | |
| Klouman, Borghild | Borghild Klouman | Actor | 1928 - 1931 | 9 | |
| Keresztes, Tamás | Tamás Keresztes | Actor | 2007 - 2019 | 9 | |
| Kurze, Günter | Günter Kurze | Actor | 1972 - 1995 | 9 | |
| Kitson, Barbara | Barbara Kitson | Actor, Dancer | 1923 - 1924 | 9 | |
| Konstantopoulos, Christos | Christos Konstantopoulos | Actor | 1985 | 9 | |
| Kopit, Arthur | Arthur Kopit | Translator | 1982 - 2010 | 9 | |
| Kremp, Jan-Gregor | Jan-Gregor Kremp | Actor | 1995 | 9 | |
| Kopp, Dave | Dave Kopp | Actor | 2002 | 9 | |
| Kuhn, Gabriela | Gabriela Kuhn | Actor | 2002 | 9 | |
| Kecsek, Karina | Karina Kecsek | Actor | 2001 - 2003 | 9 | |
| Kremer, Ulrike | Ulrike Kremer | Costume Designer | 2001 - 2003 | 9 | |
| Kovtun, Georgij | Georgij Kovtun | Adaptation, Choreographer, Director | 2003 - 2013 | 9 | |
| Knuts, Johan | Johan Knuts | Actor | 2004 | 9 | |
| Krüger, Jörg F. | Jörg F. Krüger | Actor | 2005 - 2010 | 9 | |
| Kirsch, Uli | Uli Kirsch | Actor | 2006 | 9 | |
| Klemt, Katja | Katja Klemt | Actor | 2009 - 2010 | 9 | |
| Kiritzé-Topor, Amélie | Amélie Kiritzé-Topor | Designer | 2013 - 2014 | 9 | |
| Kolovos, Giorgos | Giorgos Kolovos | Actor | 2013 | 9 | |
| Kicsid, Gizella | Gizella Kicsid | Actor | 2017 - 2019 | 9 | |
| Klykov, Vladimir | Vladimir Klykov | Sound Designer | 2017 - 2019 | 9 | |
| Kovács , Kinga | Kinga Kovács | Assistant Director | 2017 - 2019 | 9 | |
| Kauppinen, Riku, | Riku Kauppinen | Lighting Designer, Sound Designer | 1999 | 10 | |
| Koener, Claude, | Claude Koener | Actor | 1975 - 1977 | 10 | |
| Kruppa, Hannes, | Hannes Kruppa | Actor | 1975 - 1996 | 10 | |
| Kurisu, Shoji | Shoji Kurisu | Actor | 2001 - 2009 | 10 | |
| Klenk, Thomas | Thomas Klenk | Actor | 1989 - 2011 | 10 | 1 |
| Kinmansson, Gustaf, | Gustaf Kinmansson | Actor | 1869 - 1881 | 10 | |
| Kongsted, Mr., | Mr. Kongsted | Actor | 1889 | 10 | |
| Krause, Carl, | Carl Krause | Actor | 1889 - 1897 | 10 | |
| Kratz, Anna, | Anna Kratz | Actor | 1894 - 1916 | 10 | |
| Kierulf, Mr., | Mr. Kierulf | Actor | 1895 - 1896 | 10 | |
| Krampert, Fritz, | Fritz Krampert | Actor | 1902 - 1928 | 10 | |
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