| Morstad, Jørn | Jørn Morstad | Actor | 2014 | 1 | |
| Mazarekówna, Stanisława | Stanisława Mazarekówna | Actor | 1928 | 1 | |
| Modrzewski, Henryk | Henryk Modrzewski | Actor | 1928 | 1 | |
| Merlo, Giuliano | Giuliano Merlo | Director | 1973 - 1974 | 2 | |
| Mariani, Guido | Guido Mariani | Lighting Designer | 1973 - 1974 | 2 | |
| Müller, Hr. | Hr. Müller | Actor | 1878 | 1 | |
| Majetti, Antonie | Antonie Majetti | Actor | 1878 | 1 | |
| Molnar, Teodor | Teodor Molnar | Sound Designer | 2013 - 2015 | 2 | |
| Mihaiu, Horaţiu | Horaţiu Mihaiu | Designer, Director | 2016 | 4 | |
| Maxmen, Mimi | Mimi Maxmen | Costume Designer | 1971 | 1 | |
| Murphy, Robert | Robert Murphy | Lighting Designer | 1971 | 1 | |
| Montijano, José | José Montijano | Actor | 1971 | 3 | |
| Martinéz, José | José Martinéz | Lighting Designer | 1971 | 3 | |
| Méndez Herrera, José | José Méndez Herrera | Translator | 1971 - 1978 | 4 | |
| Matei, Almaya | Almaya Matei | Actor | 2005 | 1 | |
| Matei, Doina | Doina Matei | Sound Designer | 2005 | 1 | |
| Megarrity, Lindsay | Lindsay Megarrity | Designer | 1971 | 1 | |
| McBeath, Prue | Prue McBeath | Costume Designer | 1971 | 1 | |
| McQuade, Kris | Kris McQuade | Actor | 1971 | 2 | |
| Marchiş, Răzvan | Răzvan Marchiş | Actor | 2010 | 1 | |
| Meulenbroek, Agaath | Agaath Meulenbroek | Actor | 1971 | 1 | |
| Mulder, Frans | Frans Mulder | Actor | 1971 | 1 | |
| Molenkamp, Onno | Onno Molenkamp | Actor | 1971 | 1 | |
| Molenberg, Henk | Henk Molenberg | Actor | 1971 | 1 | |
| Moga, Lucian | Lucian Moga | Lighting Designer | 2016 - 2025 | 4 | |
| Marinescu, Ecaterina | Ecaterina Marinescu | Actor | 1908 | 1 | |
| Marinescu-Sion, Jean | Jean Marinescu-Sion | Actor | 1908 | 1 | |
| Malcoci, C. | C. Malcoci | Actor | 1908 | 1 | |
| Mehring, Michael | Michael Mehring | Actor | 1971 | 1 | |
| Mehring, Tobias | Tobias Mehring | Actor | 1971 | 1 | |
| Mălău, Ioana | Ioana Mălău | Dramaturg | 2017 - 2019 | 9 | |
| Meyer, Jimmy | Jimmy Meyer | Costume Designer | 1971 | 1 | |
| Mendillo, Stephen | Stephen Mendillo | Actor | 1971 | 1 | |
| Marinescu, Alice Monica | Alice Monica Marinescu | Assistant Director | 2008 | 1 | |
| Merkert, Angelika | Angelika Merkert | Actor | 1971 - 1977 | 2 | |
| Mauroeidi-Papadaki, Sofia | Sofia Mauroeidi-Papadaki | Translator | 1971 | 1 | |
| Margari, Kleopatra | Kleopatra Margari | Actor | 1971 | 1 | |
| Mazanitis, Irina | Irina Mazanitis | Actor | 1984 | 1 | |
| Manta, Vasile | Vasile Manta | Director | 1984 | 1 | |
| Messany, Adalbert | Adalbert Messany | Actor | 1971 | 1 | |
| Măruţă, Marina | Marina Măruţă | Actor | 1954 | 1 | |
| Manolescu, Ion Aurel | Ion Aurel Manolescu | Actor | 1954 | 1 | |
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