| Madison, Lawrence | Lawrence Madison | Actor | 1966 | 3 | |
| McGovern, Dennis | Dennis McGovern | Actor | 1965 | 3 | |
| Morgan, Mario | Mario Morgan | Adaptation, Director | 1965 - 1980 | 3 | |
| M. Tesoro, Carlos | Carlos M. Tesoro | Actor | 2002 | 3 | |
| Mercelas, Luisa | Luisa Mercelas | Actor | 2002 | 3 | |
| Middleton, Stephen | Stephen Middleton | Actor | 2002 - 2008 | 3 | |
| Mumenthaler, Heidi | Heidi Mumenthaler | Actor | 1989 | 3 | |
| Mizoguchi, Junko | Junko Mizoguchi | Actor | 2002 - 2007 | 3 | |
| Marques, Paula | Paula Marques | Actor | 1997 - 1998 | 3 | |
| Moranguinho, Hugo | Hugo Moranguinho | Actor | 1997 - 1998 | 3 | |
| Martins, Alexandre | Alexandre Martins | Actor | 1997 - 1998 | 3 | |
| Mouta, Filomena | Filomena Mouta | Actor | 1997 - 1998 | 3 | |
| Miranda, Maria, José | Maria José Miranda | Actor | 1997 - 1998 | 3 | |
| Moreira da Silva, Alexandra | Alexandra Moreira da Silva | Translator | 1997 - 1998 | 3 | |
| Meglič, Viktor | Viktor Meglič | Actor | 2003 - 2013 | 3 | |
| Meikle, David Scott | David Scott Meikle | Actor | 1989 | 3 | |
| Münzer, Hermann | Hermann Münzer | Lighting Designer | 1992 - 2005 | 3 | |
| Mittelstaedt, Tessa | Tessa Mittelstaedt | Actor | 2003 - 2004 | 3 | 1 |
| Martin, Thomas | Thomas Martin | Actor | 2003 - 2011 | 3 | 2 |
| Mellor, Aubrey | Aubrey Mellor | Director, Translator | 1984 - 1989 | 3 | 1 |
| Markov, Plamen | Plamen Markov | Adaptation, Director | 1997 - 2010 | 3 | |
| Mönnich, Heiko | Heiko Mönnich | Designer | 2003 | 3 | |
| Mohr, Antonia | Antonia Mohr | Actor | 1998 - 2003 | 3 | 1 |
| Meenen, Uta | Uta Meenen | Costume Designer | 2003 - 2008 | 3 | |
| Møller, Sylvia | Sylvia Møller | Actor | 2015 | 3 | |
| Møller, Tonje | Tonje Møller | Actor | 2015 | 3 | |
| Manvich, Jen | Jen Manvich | Actor | 2001 | 3 | |
| Müller, Sebastian | Sebastian Müller | Actor | 2001 - 2003 | 3 | |
| Miklósy, Judit | Judit Miklósy | Actor | 1976 | 3 | |
| Mészáros, Károly | Károly Mészáros | Actor | 1989 | 3 | |
| Micoleau, Tyler | Tyler Micoleau | Lighting Designer | 2003 - 2009 | 3 | |
| Mossegård, Lena | Lena Mossegård | Actor | 1999 - 2006 | 3 | 1 |
| Mejzlík, Martin | Martin Mejzlík | Actor | 2000 - 2008 | 3 | |
| Macri, Geny | Geny Macri | Actor | 2003 - 2004 | 3 | |
| Messaglia, Carla | Carla Messaglia | Director | 2003 - 2004 | 3 | |
| Mainardi, Fiorenza | Fiorenza Mainardi | Costume Designer | 2003 - 2004 | 3 | |
| Marshall Whittaker, Jane | Jane Marshall Whittaker | Costume Designer | 2004 - 2005 | 3 | |
| Mordal, Anne-Grete | Anne-Grete Mordal | Actor | 2004 | 3 | |
| Mordal Konradsen, Emilie | Emilie Mordal Konradsen | Actor | 2004 | 3 | |
| Motsiou, Lina | Lina Motsiou | Costume Designer, Designer | 2004 - 2012 | 3 | |
| Mišurec, Karel | Karel Mišurec | Actor | 2000 | 3 | |
| Mustafić, Dino | Dino Mustafić | Director | 2013 - 2015 | 3 | |
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