| Michels, Hans Herbert | Hans Herbert Michels | Actor | 1934 - 1958 | 2 | |
| Mabusenko, V. | V. Mabusenko | Designer | 1999 - 2000 | 2 | |
| Musina, O. | O. Musina | Actor | 1999 - 2000 | 2 | |
| Markworth, Trevor | Trevor Markworth | Actor | 2000 - 2002 | 2 | |
| Malmierca, Álvaro | Álvaro Malmierca | Adaptation, Translator | 1999 | 2 | |
| Michałowski, Janusz | Janusz Michałowski | Actor | 1994 | 2 | |
| Mendizabal, Nelly | Nelly Mendizabal | Actor | 1954 - 1955 | 2 | |
| Martin, Thomas | Thomas Martin | Actor | 1953 - 1992 | 2 | |
| Mercurio, Maria Giovanna | Maria Giovanna Mercurio | Costume Designer | 1993 - 1994 | 2 | |
| Meløy, Marianne | Marianne Meløy | Actor | 1994 - 2010 | 2 | 2 |
| Mosarov, Vladimir | Vladimir Mosarov | Director, Sound Designer | 2001 | 2 | |
| Moaleş, Elena | Elena Moaleş | Actor | 2006 | 2 | |
| Münch, Ursula | Ursula Münch | Actor | 1990 - 1992 | 2 | |
| Melsert, W. v.d. Horst-van der Lugt | Wilhelmina van der Horst-van der Lugt Melsert (W. v.d. Horst-van der Lugt Melsert) | Actor | 1911 - 1926 | 2 | |
| Merin, Eda Reiss | Eda Reiss Merin | Actor | 1971 | 2 | 1 |
| Macedonio, Francesco | Francesco Macedonio | Director | 1974 | 2 | |
| McEntee, Frank | Frank McEntee | Actor, Director | 1921 | 2 | |
| Montagnoli, Raffaele | Raffaele Montagnoli | Actor | 1996 | 2 | |
| Marino, Gian Paolo | Gian Paolo Marino | Actor | 1996 | 2 | |
| Matthiessen, Joam | Joan Matthiessen | Actor | 1989 | 2 | 1 |
| Min, Zhang | Zhang Min | Director | 1935 | 2 | |
| McDonnell, P.J. | P. J. McDonnell (P.J. McDonnell) | Actor | 1923 | 2 | |
| Merz, ? | ? Merz | Actor | 1918 - 1919 | 2 | |
| Munroe, John | John Munroe | Lighting Designer | 1981 - 2004 | 2 | |
| Malcolm, Grant | Grant Malcolm | Actor, Director | 2000 - 2022 | 2 | |
| Mayer, José | José Mayer | Actor | 1994 - 2002 | 2 | |
| Merő, Béla | Béla Merő | Director | 2005 - 2010 | 2 | 1 |
| Müller, Lolo | Lolo Müller | Actor | 1896 - 1897 | 2 | |
| Moses, Carina | Carina Moses | Actor | 2009 - 2011 | 2 | |
| Mikkola, Juhani | Juhani Mikkola | Lighting Designer | 1981 - 1995 | 2 | |
| Manto, Erja | Erja Manto | Actor | 1992 - 1994 | 2 | |
| Maher, Matthew | Matthew Maher | Actor | 2011 - 2020 | 2 | 3 |
| Matthíasson, Ari | Ari Matthíasson | Actor | 1993 | 2 | |
| Müller, Eva Verena | Eva Verena Müller | Actor | 2011 - 2012 | 2 | 1 |
| McIntosh, Duncan | Duncan McIntosh | Translator | 2011 | 2 | |
| McCluer, Carol | Carol McCluer | Actor | 2001 - 2009 | 2 | |
| Melato, Mariangela | Mariangela Melato | Actor | 2011 | 2 | 1 |
| Martinez, Derly | Derly Martinez | Lighting Designer, Sound Designer | 1945 | 2 | |
| Mahmood, Barez Majeed | Barez Majeed Mahmood | Actor, Director | 2011 | 2 | |
| Main, Carolina | Carolina Main | Actor | 2010 - 2011 | 2 | |
| Massafra, Marco | Marco Massafra | Actor | 2010 - 2022 | 2 | 1 |
| Merritt, Michael | Michael Merritt | Designer | 1973 - 1991 | 2 | |
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