| Montenegro, Ira | Ira Montenegro | Lighting Designer | 1988 - 1989 | 4 | |
| Melander, Nils | Nils Melander | Actor | 2001 | 4 | |
| Mestrez, Hubert | Hubert Mestrez | Actor | 1975 - 1977 | 10 | |
| Minkus, Hannelore | Hannelore Minkus | Actor | 1953 - 1954 | 4 | |
| Mayer, José | José Mayer | Actor | 1994 - 2002 | 2 | |
| Mendes, Cássio Gabus | Cássio Gabus Mendes | Actor | 2002 | 1 | |
| Müller, Margarethe | Margarethe Müller | Actor | 1895 - 1897 | 3 | |
| Müller, Emmy | Emmy Müller | Actor | 1893 - 1897 | 3 | |
| Müller, Lolo | Lolo Müller | Actor | 1896 - 1897 | 2 | |
| Merten, Claudius | Claudius Merten | Actor | 1889 - 1907 | 4 | |
| Müller, Trude | Trude Müller | Actor | 1895 | 1 | |
| Mietens, Pia | Pia Mietens | Actor | 1932 - 1941 | 3 | |
| Mayer, Murphy | Murphy Mayer | Actor | 2011 | 1 | |
| Martin, William | William Martin | Sound Designer | 2011 | 1 | |
| Moriau, Stephanie | Stephanie Moriau | Actor | 2011 | 1 | |
| Moses, Carina | Carina Moses | Actor | 2009 - 2011 | 2 | |
| Musician, Tim | Tim Musician | | | | |
| Macdougall, Irene | Irene Macdougall | Actor | 2007 - 2010 | 25 | |
| McNair, Leon | Leon McNair | Actor | 2010 | 1 | |
| Macaulay, Lema | Lema Macaulay | Actor | 2010 | 1 | |
| Masini, Antonella | Antonella Masini | Actor | 1999 | 1 | |
| Msuku, Bennie | Bennie Msuku | Actor | 2006 | 22 | |
| Maloya, Chimwemwe | Chimwemwe Maloya | Actor | 2006 | 4 | |
| Markström, Matilda | Matilda Markström | Actor | 2007 | 1 | |
| Mitle, Max | Max Mitle | Lighting Designer | 2004 - 2013 | 3 | |
| Mikkola, Juhani | Juhani Mikkola | Lighting Designer | 1981 - 1995 | 2 | |
| Manto, Erja | Erja Manto | Actor | 1992 - 1994 | 2 | |
| Minna, - | - Minna | Actor | 1881 | 1 | |
| Mundell, Jacob | Jacob Mundell | Actor | 2011 | 1 | |
| Mirowski, Malvina | Malvina Mirowski | Actor | 2011 | 1 | |
| Makar, Valentin | Valentin Makar | Actor | 2004 | 1 | |
| Matthíasson, Ari | Ari Matthíasson | Actor | 1993 | 2 | |
| Morris, Bea | Bea Morris | Actor | 1972 | 1 | |
| Mooney, Kristin | Kristin Mooney | Actor | 1972 | 1 | |
| Modereger, Jeff | Jeff Modereger | Designer | 2010 | 1 | |
| Mylonas, Niki | Niki Mylonas | Actor | 2011 | 1 | |
| Marshall, Caleb | Caleb Marshall | Actor, Director | 2011 | 4 | |
| Miller, Gordon S. | Gordon S. Miller | Actor | 2011 - 2024 | 3 | |
| McIntosh, Duncan | Duncan McIntosh | Translator | 2011 | 2 | |
| Mockus, Anthony | Anthony Mockus | Actor | 1973 | 1 | |
| Mali, Derek | Derek Mali | Actor | 2001 | 1 | |
| McCluer, Carol | Carol McCluer | Actor | 2001 - 2009 | 2 | |
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