| Midelfort, Emil | Emil Midelfort | Actor | 1913 | 1 | |
| Madsen, Julius | Julius Madsen | Actor | 1913 | 1 | |
| Monahon, Talene | Talene Monahon | Actor | 2010 | 1 | |
| Markson, Jay Ben | Jay Ben Markson | Actor | 2010 | 1 | |
| Mavricos, David | David Mavricos | Actor | 2010 | 1 | |
| Möck, Anne | Anne Möck | Actor | 2010 | 11 | |
| Mack, Billy | Billy Mack | Actor | 2009 - 2021 | 6 | |
| Meininger, Klaus | Klaus Meininger | Actor | 2009 | 1 | |
| Mitterstieler, Georg | Georg Mitterstieler | Actor | 2009 - 2017 | 2 | |
| Mišič, Ksenija | Ksenija Mišič | Actor | 2009 - 2013 | 5 | |
| Mihelič, Irena | Irena Mihelič | Actor | 2009 | 3 | |
| Marriage, Oliver | Oliver Marriage | Actor | 2009 | 2 | |
| Malburg, Philipp | Philipp Malburg | Actor | 1903 | 1 | |
| Moen, Tuva | Tuva Moen | Actor | 2015 - 2023 | 2 | |
| Miller, Laura | Laura Miller | Actor | 2010 | 1 | |
| Meyer, Nancy | Nancy Meyer | Actor | 2010 | 1 | |
| M. P., Susheela | Susheela M. P. | Actor | 2015 | 1 | |
| Machida, Marie | Marie Machida | Actor | 2009 | 1 | |
| Maydon, Alistair | Alistair Maydon | Actor | 2009 | 1 | |
| Mathews, Barbara | Barbara Mathews | Actor | 2009 | 1 | |
| Macheiner, Barbara | Barbara Macheiner | Actor | 2009 | 4 | |
| Meling, Ina | Ina Meling | Actor | 2009 | 2 | |
| Maguire, Georgia | Georgia Maguire | Actor | 2009 | 1 | |
| McMurtry, Jonathan | Jonathan McMurtry | Actor | 2010 | 1 | 1 |
| Mayn, Bianca, Ioana | Bianca Ioana Mayn | Actor | 2016 | 1 | |
| Maaß, Stefan | Stefan Maaß | Actor | 2009 | 1 | |
| Malmberg, Karl | Karl Malmberg | Actor | 2010 - 2011 | 2 | 2 |
| Mukhoapdhyay, Sohini | Sohini Mukhoapdhyay | Actor | 2009 - 2010 | 3 | |
| Mukhopadhyay, Shiboprasad | Shiboprasad Mukhopadhyay | Actor | 2009 - 2010 | 3 | |
| Müller, Anne | Anne Müller | Actor | 2009 - 2010 | 20 | 1 |
| Mägi, Arvi | Arvi Mägi | Actor | 2001 - 2010 | 2 | |
| Matić, Peter | Peter Matić | Actor | 2010 | 1 | |
| Montes, Felipe | Felipe Montes | Actor | 2010 | 1 | |
| Millington, Kevin | Kevin Millington | Actor | 2010 | 3 | |
| Morris, Lewis | Lewis Morris | Actor | 2010 | 2 | |
| Marschall, Gona | Gona Marschall | Actor | 1917 | 1 | |
| Myrén, Moa | Moa Myrén | Actor | 2009 | 1 | |
| Moliner, Benjamin | Benjamin Moliner | Actor | 2009 - 2011 | 6 | |
| Marowsky, Karl | Karl Marowsky | Actor | 1909 - 1912 | 2 | |
| Modic, Hans | Hans Modic | Actor | 1909 | 1 | |
| Mongillo, Fiona | Fiona Mongillo | Actor | 2009 | 1 | 1 |
| Masumoto, Tatsuya | Tatsuya Masumoto | Actor | 2009 | 1 | |
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