| 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 | |
| Margot, Hedwig | Hedwig Margot | Actor | 1896 - 1908 | 26 | |
| Makar, Valentin | Valentin Makar | Actor | 2004 | 1 | |
| Myren, Eivind | Eivind Myren | Lighting Designer | 2010 - 2020 | 60 | |
| Matthíasson, Ari | Ari Matthíasson | Actor | 1993 | 2 | |
| Müller, Eva Verena | Eva Verena Müller | Actor | 2011 - 2012 | 2 | |
| Mackert, Pia Maria | Pia Maria Mackert | Costume Designer, Designer | 2011 - 2012 | 10 | |
| 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 | Gordon Miller | Actor | 2011 | 2 | |
| 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 | |
| Mack, William B. | William B. Mack | Actor | 1903 - 1907 | 8 | |
| Mittell, Karl | Karl Mittell | Actor | 1880 | 1 | |
| Mavrogeorgi, Georgia | Georgia Mavrogeorgi | Actor | 2010 | 1 | |
| Melato, Mariangela | Mariangela Melato | Actor | 2011 | 2 | |
| Moselli, Barbara | Barbara Moselli | Actor | 2011 | 1 | |
| Manon, Violeta | Violeta Manon | Actor | 1956 | 1 | |
| Mosetti, Maurizio | Maurizio Mosetti | Actor | 1990 | 1 | |
| Micheli, Stefania | Stefania Micheli | Actor | 1990 | 1 | |
| Menichelli, Patrizia | Patrizia Menichelli | Costume Designer | 1990 | 1 | |
| Maiello, Teth | Teth Maiello | Actor | 2005 - 2009 | 3 | |
| Monteiro, Bruno | Bruno Monteiro | Composer | 2009 | 1 | |
| Marsó, Silvia | Silvia Marsó | Actor | 2010 - 2011 | 40 | |
| Martínes, Pedro Miguel | Pedro Miguel Martínes | Actor | 2010 - 2011 | 40 | |
| May, Sylvia | Sylvia May | Actor | 1933 | 1 | |
| Magalhães, Mauro | Mauro Magalhães | Actor | 1945 | 1 | |
| Martinez, Derly | Derly Martinez | Lighting Designer, Sound Designer | 1945 | 2 | |
| Mitchell, Finn | Finn Mitchell | Actor | 2011 | 1 | |
| Marlow, Karla | Karla Marlow | Actor | 1917 | 1 | |
| Mork, Lutz | Lutz Mork | Actor | 1972 | 1 | |
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