| Massara, Pino | Pino Massara | Composer | 1975 - 1976 | 3 | |
| Meyer, Donna | Donna Meyer | Costume Designer | 1975 | 1 | |
| Marcussen, Michael | Michael Marcussen | Actor | 1980 | 1 | |
| Modica, Dolores | Dolores Modica | Actor | 1979 | 1 | |
| Modica, Juliette | Juliette Modica | Actor | 1979 | 1 | |
| Moody, James | James Moody | Actor | 1979 | 1 | |
| Mauthe, Florian | Florian Mauthe | Actor | 1975 | 1 | |
| Medwed, Silva | Silva Medwed | Actor | 1970 - 1975 | 2 | |
| Mauren, Otto | Otto Mauren | Actor | 1900 | 1 | |
| Marquardt, Lotte | Lotte Marquardt | Actor | 1976 - 1993 | 5 | |
| Meter, Jeremy, van | Jeremy van Meter | Actor | 2012 - 2014 | 9 | |
| McCardle, Dillon | Dillon McCardle | Sound Designer | 2014 | 1 | |
| Minora, Lee | Lee Minora | Actor | 2014 | 2 | |
| Monteiro, Luís, de Sttau | Luís de Sttau Monteiro | Adaptation, Director, Translator | 1972 | 3 | |
| Maria, Guida | Guida Maria | Actor | 1972 | 1 | |
| Mota, Cândido | Cândido Mota | Actor | 1972 | 1 | |
| Miller, Jan | Jan Miller | Actor | 1973 | 1 | |
| Mercatali, Magda | Magda Mercatali | Actor | 1969 - 1981 | 3 | |
| Mramor, Walter | Walter Mramor | Actor | 1981 | 1 | |
| Minet, André | André Minet | Actor | 1981 | 5 | |
| Minet, Karin | Karin Minet | Actor | 1981 | 6 | |
| Mills, Suzanne | Suzanne Mills | Actor | 1979 | 1 | |
| McColly, Michael | Michael McColly | Actor | 1979 | 1 | |
| Moschidis, Giorgos | Giorgos Moschidis | Actor | 1979 - 2008 | 7 | |
| Matthews, Sam | Sam Matthews | Actor | 2013 | 1 | |
| McNern, Samantha | Samantha McNern | Director | 2013 | 1 | |
| Miereanu, Costin | Costin Miereanu | Composer | 1981 | 1 | |
| Medina, Candelario | Candelario Medina | Designer | 1976 | 1 | |
| Meech, Tony | Tony Meech | Actor | 1972 | 1 | |
| Moulart, Jean | Jean Moulart | Actor | 1981 | 1 | |
| Milnerowicz, Piotr | Piotr Milnerowicz | Actor | 1976 | 1 | |
| Marzinek, Elżbieta | Elżbieta Marzinek | Actor | 1976 | 1 | |
| Monnet, Gabriel | Gabriel Monnet | Actor | 1976 | 1 | |
| Maxence, Pierre | Pierre Maxence | Actor, Director, Translator | 1972 - 1976 | 3 | |
| Marano, Ezio | Ezio Marano | Actor | 1972 | 1 | |
| Maltagliati, Evi | Evi Maltagliati | Actor | 1951 - 1972 | 2 | |
| Myrron, Willy | Willy Myrron | Actor | 1981 | 1 | |
| Markkanen, Tiina | Tiina Markkanen | Actor | 1981 | 1 | |
| Müller, Hannu | Hannu Müller | Actor | 1981 | 1 | |
| Mintscheva, Velika | Velika Mintscheva | Actor | 1979 | 1 | |
| Momme, Anders | Anders Momme | Actor | 2013 | 3 | |
| Mehabil, Lila, Nobel | Lila Nobel Mehabil | Actor | 2013 | 3 | |
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