| Mosleh, Siham | Siham Mosleh | Actor | 1993 | 3 | |
| Maesschalck, Ruurt, de | Ruurt de Maesschalck | Actor | 1991 - 2004 | 115 | |
| Monk, Isabell | Isabell Monk | Actor | 1993 | 1 | |
| McGuire, William, Francis | William Francis McGuire | Actor | 1993 | 2 | |
| Makraki, Anna | Anna Makraki | Actor | 1991 | 1 | |
| Manolas, Giorgos | Giorgos Manolas | Actor | 1991 | 1 | |
| Manolas, Antonis | Antonis Manolas | Actor | 1991 | 1 | |
| Mesaris, Kostas | Kostas Mesaris | Actor | 1991 | 1 | |
| Morogiannis, Giorgos | Giorgos Morogiannis | Actor | 1981 - 1991 | 11 | |
| Márkus, Alfréd | Alfréd Márkus | Translator | 1999 | 1 | |
| Mesterházy, Gyula | Gyula Mesterházy | Actor | 2004 - 2006 | 2 | |
| Mihályffy, Károly | Károly Mihályffy | Actor | 1908 | 1 | |
| Monteiro, Roméo | Roméo Monteiro | Actor, Musician | 2012 - 2018 | 32 | |
| Mukherjee, Sharbani | Sharbani Mukherjee | Actor | 2014 | 1 | |
| Mushran, Ashwin | Ashwin Mushran | Actor | 2014 - 2018 | 9 | |
| Martinovics, Dorina | Dorina Martinovics | Actor | 2013 | 1 | |
| Martin, Márta | Márta Martin | Actor | 2013 | 1 | |
| Mortelliti, Adriana | Adriana Mortelliti | Choreographer | 2014 | 1 | |
| Muranyi-Kovacs, Françoise | Françoise Muranyi-Kovacs | Actor | 1994 | 1 | |
| Marty, Charles | Charles Marty | Designer | 1994 | 1 | |
| Marr, Oceana | Oceana Marr | Actor | 1994 | 1 | |
| Möckel, Thomas | Thomas Möckel | Conductor | 1994 | 1 | |
| Møller, Trine, Bastrup | Trine Bastrup Møller | Actor | 2015 | 1 | |
| Max | Max - | Actor | 2015 | 1 | |
| Miquel, Jean-Pierre | Jean-Pierre Miquel | Adaptation, Director, Lighting Designer | 1982 - 2002 | 4 | |
| Müller, Mareille | Mareille Müller | Actor | 1982 | 1 | |
| McPherson, Alexander | Alexander McPherson | Costume Designer, Designer | 1971 - 1982 | 3 | |
| Moshammer, Bernhard | Bernhard Moshammer | Musical Director | 2014 - 2017 | 10 | |
| Musumeci, Joe | Joe Musumeci | Actor | 1982 | 1 | |
| Moran, Daniel | Daniel Moran | Actor | 1982 | 1 | |
| Massaro, Joe | Joe Massaro | Actor | 1982 | 1 | |
| Moreno, Edmund | Edmund Moreno | Actor | 1982 | 1 | |
| Majewski, Maria | Maria Majewski | Actor | 1977 - 1982 | 6 | |
| McKinney, Alisha | Alisha McKinney | Actor | 1994 - 2002 | 2 | |
| Masuth, Matthias | Matthias Masuth | Director | 1982 | 1 | |
| Martin, Sam | Sam Martin | Actor | 1994 | 1 | |
| Morrison, Sarah | Sarah Morrison | Actor | 1982 | 1 | |
| Marçal, Terezinha | Terezinha Marçal | Actor | 1982 | 4 | |
| Marques, Arnaldo | Arnaldo Marques | Actor | 1982 | 10 | |
| Maia, Melise | Melise Maia | Actor | 1982 | 4 | |
| Mello, José Augusto | José Augusto Mello | Lighting Designer | 1982 | 2 | |
| Müller-Elmau, Markwart | Markwart Müller-Elmau | Actor | 1994 - 2017 | 5 | |
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