| Krogstad, Jenny | Jenny Krogstad | Mask Maker | 1971 | 1 | |
| Keir, Sasha | Sasha Keir | Costume Designer | 1990 | 2 | |
| Kitzl, Albert | Albert Kitzl | Actor | 1966 - 2008 | 13 | |
| Kolehmainen, Eero-Pekka | Eero-Pekka Kolehmainen | Composer | 1995 - 1996 | 2 | |
| Klintrup, Anna-Maria | Anna-Maria Klintrup | Actor | 1995 - 1996 | 2 | |
| Kiiskinen, Vera | Vera Kiiskinen | Actor | 1995 - 1996 | 2 | |
| Kabre, Athanase | Athanase Kabre | Actor | 1992 | 2 | |
| Kabore, Mathieu | Mathieu Kabore | Actor | 1992 | 1 | |
| Kortekaas, Niek | Niek Kortekaas | Costume Designer, Designer, Lighting Designer | 1992 - 1998 | 8 | |
| Kroese, Gerhard | Gerhard Kroese | Mask Maker | 1992 - 1995 | 3 | |
| Kleijn, Tom | Tom Kleijn | Translator | 1992 - 2008 | 21 | |
| Kalinina, Elena | Elena Kalinina | Actor | 1996 - 2013 | 2 | |
| Kiszkis, Jerzy | Jerzy Kiszkis | Actor | 1992 - 2001 | 3 | |
| Kolak, Dorota | Dorota Kolak | Actor | 1992 - 2001 | 3 | |
| Krobot, Ivo | Ivo Krobot | Director | 1995 - 1996 | 2 | |
| Kavallieratos, Marianna | Marianna Kavallieratos | Choreographer | 2005 - 2006 | 4 | |
| Kluźniak, Dominika | Dominika Kluźniak | Actor | 2005 - 2006 | 4 | |
| Kazragyte, Doloresa | Doloresa Kazragyte | Actor | 1998 - 2000 | 4 | |
| Kirkenær, Jorunn | Jorunn Kirkenær (Jorunn Kirkenaer) | Choreographer | 1971 | 21 | |
| Kirchhoff, Corinna | Corinna Kirchhoff | Actor | 1993 - 2013 | 5 | |
| Kogge, Imogen | Imogen Kogge | Actor | 1993 - 2006 | 5 | |
| Kranidiotis, Panos | Panos Kranidiotis | Actor | 1990 - 1991 | 2 | |
| Knop, Václav | Václav Knop | Actor | 1990 - 1995 | 4 | |
| Kolding, Mette | Mette Kolding | Actor | 1999 - 2000 | 3 | |
| Korn, Werner | Werner Korn | Actor | 1964 - 1977 | 3 | |
| Krause, Elisabeth | Elisabeth Krause | Actor | 1977 | 1 | |
| Korhonen, Siviä | Siviä Korhonen | Actor | 1928 | 1 | |
| Kay, Arthur W. | Arthur W. Kay | Director | 1928 - 1967 | 2 | |
| Košak, Vinko | Vinko Košak | Translator | 1928 - 1929 | 2 | |
| Kuhne, Friedrich | Friedrich Kuhne | Actor | 1929 | 1 | |
| Kalogeropoulou, Titsa | Titsa Kalogeropoulou | Actor | 1929 | 1 | |
| Konstantinidis, Sp. | Sp. Konstantinidis | Actor | 1929 | 1 | |
| Komisarževskis, Fjodors | Fjodors Komisarževskis | Director | 1929 | 1 | |
| Kurent, Andrej | Andrej Kurent | Actor | 1979 | 2 | |
| Kabelač, Miroslav | Miroslav Kabelač | Musical Director | 1979 | 2 | |
| Kociniak, Jan | Jan Kociniak | Actor | 1970 - 1971 | 2 | |
| Kociniak, Marian | Marian Kociniak | Actor | 1970 - 1971 | 2 | |
| Kaljord, Kim | Kim Kaljord | Actor | 1970 | 1 | |
| Kotamanidou, Eva | Eva Kotamanidou | Actor | 1978 - 1989 | 4 | |
| Kostopoulos, Lampros | Lampros Kostopoulos | Director | 1972 - 1989 | 4 | |
| Karydis, Giannis | Giannis Karydis | Costume Designer, Designer | 1978 - 1990 | 8 | |
| Keurdorst, Derek | Derek Keurdorst | Actor | 1978 | 1 | |
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