| Mansour, Youssef Ait | Youssef Ait Mansour (Youssef Ait Mansour) | Actor | 2002 - 2017 | 15 | |
| Mariani, Teresa | Teresa Mariani | Actor | 1892 - 1910 | 33 | |
| Myers, Troy | Troy Myers (Troy Myers) | Actor | 2006 | 2 | |
| Maxie Federman, Heather | Heather Maxie Federman (Heather Maxie Federman) | Actor | 1995 | 1 | |
| Martin, Nigel | Nigel Martin (Nigel Martin) | Actor | 1984 | 1 | |
| Maoysz, Mieczysoaw | Mieczysoaw Maoysz (Mieczysoaw Maoysz) | Director | 1970 | 1 | |
| Müller, U. | U. Müller (U. Müller) | Actor | 1999 | 1 | |
| Moore, Eva Mae | Eva Mae Moore (Eva Mae Moore) | Actor | 1928 | 2 | |
| Mari, Febo | Febo Mari (Febo Mari) | Actor, Director | 1919 | 2 | |
| Mordeglia, Nietta | Nietta Mordeglia (Nietta Mordeglia) | Actor | 1919 | 1 | |
| Maurstad, Toralv | Toralv Maurstad (Toralv Maurstad) | Actor, Director, Musical Director | 1940 - 2020 | 40 | |
| Mićunović, Branislav | Branislav Mićunović (Branislav Mićunović) | Adaptation, Costume Designer, Designer, Director | 2000 - 2001 | 12 | |
| McClennahan, Charles H. | Charles H. McClennahan (Charles H. McClennahan) | Designer | 1989 | 1 | |
| Mikula-Proksa, Marzena | Marzena Mikula-Proksa (Marzena Mikula-Proksa) | Composer | 1979 | 1 | |
| McIntyre, Deirdre | Deirdre McIntyre (Deirdre McIntyre) | Lighting Designer | 1960 | 1 | |
| Mihályfi, Mihályfi | Mihályfi Mihályfi (Mihályfi Mihályfi) | Actor | 1889 - 1890 | 2 | |
| Márkus, Emília | Emília Márkus | Actor | 1889 - 1927 | 22 | |
| Madsen, Kristian Riis | Kristian Riis Madsen (Kristian Riis Madsen) | Designer | 2006 | 1 | |
| Møller, Valdemar | Valdemar Møller (Valdemar Møller) | Actor | 1906 - 1933 | 16 | |
| Mjøs, Jon Endre | Jon Endre Mjøs (Jon Endre Mjøs) | Actor | 1995 | 1 | |
| Meloy, Nordvik | Nordvik Meloy (Nordvik Meloy) | | | | |
| Magnussen, Arne Chr. | Arne Chr. Magnussen (Arne Chr. Magnussen) | Actor | 1951 | 8 | |
| Morgen, Therese | Therese Morgen (Therese Morgen) | Actor | 1916 - 1921 | 2 | |
| Mallickjoly, Wahida | Wahida Mallickjoly (Wahida Mallickjoly) | Costume Designer | 1998 | 1 | |
| Michels, Hans Herbert | Hans Herbert Michels (Hans Herbert Michels) | Actor | 1934 - 1958 | 2 | |
| Makedonskij, K. | K. Makedonskij (K. Makedonskij) | Actor | 1938 | 1 | |
| Malachova, Z. | Z. Malachova (Z. Malachova) | Actor | 1938 | 1 | |
| Mabusenko, V. | V. Mabusenko (V. Mabusenko) | Designer | 1999 - 2000 | 2 | |
| Musina, O. | O. Musina (O. Musina) | Actor | 1999 - 2000 | 2 | |
| Markworth, Trevor | Trevor Markworth (Trevor Markworth) | Actor | 2000 - 2002 | 2 | |
| Merckel, Nola | Nola Merckel (Nola Merckel) | Actor | 2002 | 1 | |
| Mowrey, Terri | Terri Mowrey (Terri Mowrey) | Actor | 2007 | 1 | |
| Malých, Mrs. | Mrs. Malých (Mrs. Malých) | Actor | 1904 | 1 | |
| Magazzari, Ms. | Ms. Magazzari (Ms. Magazzari) | Actor | 1891 - 1892 | 3 | |
| Mazzanti, Ettore | Ettore Mazzanti (Ettore Mazzanti) | Actor | 1891 - 1907 | 21 | |
| Marien, Pierre | Pierre Marien (Pierre Marien) | Actor | 1984 | 1 | |
| Malmierca, Álvaro | Álvaro Malmierca (Álvaro Malmierca) | Adaptation, Translator | 1999 | 2 | |
| Mazzarelli, - | - Mazzarelli (- Mazzarelli) | Actor | 1999 | 1 | |
| McDonald, Frank | Frank McDonald (Frank McDonald) | Actor | 1971 - 1985 | 4 | |
| Michałowski, Janusz | Janusz Michałowski (Janusz Michałowski) | Actor | 1994 | 2 | |
| Masek, Vaclav | Vaclav Masek (Vaclav Masek) | Actor | 1924 | 1 | |
| Mlakar, Dušan | Dušan Mlakar (Dusan Mlakar) | Adaptation, Director | 1979 - 2012 | 9 | |
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