| Mesaris, Kostas | Kostas Mesaris | Actor | 1991 – 1992 | 1 | |
| Morogiannis, Giorgos | Giorgos Morogiannis | Actor | 1981 – 1992 | 11 | |
| Márkus, Alfréd | Alfréd Márkus | Translator | 1999 | 1 | |
| Mesterházy, Gyula | Gyula Mesterházy | Actor | 2004 – 2007 | 2 | |
| Mihályffy, Károly | Károly Mihályffy | Actor | 1908 | 1 | |
| Monteiro, Roméo | Roméo Monteiro | Actor, Musician | 2012 – 2014 | 8 | |
| Mukherjee, Sharbani | Sharbani Mukherjee | Actor | 2014 | 1 | |
| Mushran, Ashwin | Ashwin Mushran | Actor | 2014 – 2015 | 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 | |
| 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 | 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 | |
| Mahlberg, Reinhard | Reinhard Mahlberg | Actor | 1994 | 3 | |
| Myllymäki, Anita | Anita Myllymäki | Director | 1982 | 1 | |
| McCarthy, Neil | Neil McCarthy | Actor | 1994 | 1 | |
| Maxwell, Michele | Michele Maxwell | Musician | 1994 | 1 | |
| Meise, Birgitta | Birgitta Meise | Actor | 1982 | 1 | |
| Māsēns, Agris | Agris Māsēns | Actor, Director | 1982 – 2012 | 3 | |
| McWhinnie, Donald | Donald McWhinnie | Director | 1959 | 2 | |
| Marenić, Vladimir | Vladimir Marenić | Designer | 1982 | 1 | |
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