| Kitsch, Lynn | Lynn Kitsch | Actor | 1989 | 1 | |
| Kruczek, Jakub | Jakub Kruczek | Actor | 2012 | 1 | |
| Konopiński, Maciej | Maciej Konopiński | Actor | 2011 | 1 | |
| Kojro, Dominika | Dominika Kojro | Actor | 2010 | 1 | |
| Kołodyńska, Dorota | Dorota Kołodyńska | Costume Designer, Designer | 2009 - 2012 | 8 | |
| Kierzkowska, Maria | Maria Kierzkowska | Actor | 2009 - 2016 | 5 | |
| Kutnik, Marek | Marek Kutnik | Lighting Designer | 2009 | 2 | |
| Kireńczuk, Tomasz | Tomasz Kireńczuk | Dramaturg | 2009 | 2 | |
| Krafftówna, Barbara | Barbara Krafftówna | Actor | 2007 | 2 | |
| Kołakowski, Sławomir | Sławomir Kołakowski | Actor | 2007 | 1 | |
| Kupiec, Mirosław | Mirosław Kupiec | Actor | 2007 | 3 | |
| Kostrzyński, Mateusz | Mateusz Kostrzyński | Actor | 2007 | 3 | |
| Krzyżowski, Radosław | Radosław Krzyżowski | Actor | 2007 - 2016 | 11 | |
| Kulig, Justyna | Justyna Kulig | Actor | 2007 | 1 | |
| Kominek, Karolina | Karolina Kominek | Actor | 2007 - 2009 | 2 | |
| Kołodziejska, Tatiana | Tatiana Kołodziejska | Actor | 2006 | 1 | |
| Kościuk, Michał | Michał Kościuk | Actor | 2006 - 2007 | 3 | |
| Kałużyński, Marek | Marek Kałużyński | Actor | 2006 - 2007 | 3 | |
| Karczmarska, Anna Maria | Anna Maria Karczmarska | Costume Designer, Designer | 2006 | 2 | |
| Korpalska, Anna | Anna Korpalska | Translator | 2006 | 1 | |
| Kacprzycki, Paweł | Paweł Kacprzycki | Actor | 2006 | 1 | |
| Krawczuk, Adam | Adam Krawczuk | Actor | 2005 - 2007 | 2 | |
| Kilarska, Elżbieta | Elżbieta Kilarska | Actor | 1999 | 1 | |
| Kuta, Magdalena | Magdalena Kuta | Actor | 1999 | 1 | |
| Kaczmarek, Joanna | Joanna Kaczmarek | Actor | 1999 | 1 | |
| Kaszewska, Kinga | Kinga Kaszewska | Actor | 1999 | 5 | |
| Kaczyński, Adam | Adam Kaczyński | Composer | 1978 | 1 | |
| Kronek, Ludwig | Ludwig Kronek | Actor | 1905 | 1 | |
| Kosinski, Jan | Jan Kosinski | Designer | 1957 | 1 | |
| Krzemiński, Władysław | Władysław Krzemiński | Director | 1957 | 1 | |
| Kaliszewski, Jerzy | Jerzy Kaliszewski | Actor | 1957 | 1 | |
| Krzyżanowski, Ryszard | Ryszard Krzyżanowski | Actor | 1957 | 1 | |
| Kurek, Kazimierz | Kazimierz Kurek | Actor | 1959 | 1 | |
| Kubalski, Tadeusz | Tadeusz Kubalski | Actor, Director | 1955 - 1957 | 3 | |
| Kurowski, Piotr | Piotr Kurowski | Actor | 1957 | 1 | |
| Kumlin, Tom | Tom Kumlin | Lighting Designer | 2001 - 2007 | 2 | |
| Kąkol, Stefan | Stefan Kąkol | Actor | 1960 | 1 | |
| Koronkiewicz, Teofila | Teofila Koronkiewicz | Actor | 1962 | 1 | |
| Kęstowicz, Zygmunt | Zygmunt Kęstowicz | Actor | 1963 | 1 | |
| Krzewicki, Jan | Jan Krzewicki | Designer | 1963 | 1 | |
| Kaszycki, Lucjan | Lucjan Kaszycki | Composer | 1963 | 1 | |
| Keppler, Melanie | Melanie Keppler | Actor | 2014 | 1 | |
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