| Mylroy, Donna | Donna Mylroy | Actor | 1936 | 1 | |
| Molron, France | France Molron | Actor | 1975 - 1977 | 10 | |
| Madsen, Frederik | Frederik Madsen | Actor | 1876 - 1880 | 2 | |
| Mahamood Ansari, Atta | Atta Mahamood Ansari | Assistant Director | 1992 | 1 | |
| Mercurio, Mimma | Mimma Mercurio | Actor | 1994 | 1 | |
| MacHugh, Tina | Tina MacHugh | Lighting Designer | 1990 - 2000 | 13 | |
| Makuchenko, V. | V. Makuchenko | | | | |
| Meisner, Robin | Robin Meisner | Actor | 2002 - 2009 | 43 | |
| Mitsuya, Mori | Mori Mitsuya | | | | |
| Mette Swenson, Trine | Trine Mette Swenson | Lighting Designer, Mask Maker | 1989 - 1997 | 154 | |
| Møller, Mette | Mette Møller | Choreographer | 1976 - 1990 | 97 | |
| Maës, Tove | Tove Maës | Actor | 1967 | 1 | |
| Mezzacappo, E | E Mezzacappo | Composer | 1937 | 1 | |
| Meyer MacLeod, Arielle | Arielle Meyer MacLeod | Dramaturg | 2004 | 1 | |
| Manni, Tarmo | Tarmo Manni | Actor | 1955 - 1973 | 3 | |
| Myrann Sørbøe, Ilene | Ilene Myrann Sørbøe | Actor, Director, Dramaturg | 1999 - 2023 | 8 | |
| Montarello, Jose | Jose Montarello | Actor | 1986 | 2 | |
| Mitchell, Tate Katie | Tate Katie Mitchell | Actor | 2003 - 2011 | 34 | |
| Muphuwa, Fred | Fred Muphuwa | Actor, Composer | 2006 | 24 | |
| Mansour, Youssef Ait | Youssef Ait Mansour | Actor | 2002 - 2017 | 15 | |
| Mariani, Teresa | Teresa Mariani | Actor | 1892 - 1910 | 33 | |
| Maxie Federman, Heather | Heather Maxie Federman | Actor | 1995 | 1 | |
| Martin, Nigel | Nigel Martin | Actor | 1984 | 1 | |
| Maoysz, Mieczysoaw | Mieczysoaw Maoysz | Director | 1970 | 1 | |
| Müller, U. | U. Müller | Actor | 1999 | 1 | |
| Moore, Eva Mae | Eva Mae Moore | Actor | 1928 | 2 | |
| Mari, Febo | Febo Mari | Actor, Director | 1919 | 2 | |
| Mordeglia, Nietta | Nietta Mordeglia | Actor | 1919 | 1 | |
| Mićunović, Branislav | Branislav Mićunović | Adaptation, Costume Designer, Designer, Director | 2000 - 2001 | 12 | |
| McClennahan, Charles H. | Charles H. McClennahan | Designer | 1989 | 1 | |
| Mikula-Proksa, Marzena | Marzena Mikula-Proksa | Composer | 1979 | 1 | |
| McIntyre, Deirdre | Deirdre McIntyre | Lighting Designer | 1960 | 1 | |
| Mihályfi, Mihályfi | Mihályfi Mihályfi | Actor | 1889 - 1890 | 2 | |
| Madsen, Kristian Riis | Kristian Riis Madsen | Designer | 2006 | 1 | |
| Mjøs, Jon Endre | Jon Endre Mjøs | Actor | 1995 | 1 | |
| Meloy, Nordvik | Nordvik Meloy | | | | |
| Morgen, Therese | Therese Morgen | Actor | 1916 - 1921 | 2 | |
| Mallickjoly, Wahida | Wahida Mallickjoly | Costume Designer | 1998 | 1 | |
| Michels, Hans Herbert | Hans Herbert Michels | Actor | 1934 - 1958 | 2 | |
| Makedonskij, K. | K. Makedonskij | Actor | 1938 | 1 | |
| Malachova, Z. | Z. Malachova | Actor | 1938 | 1 | |
| Mabusenko, V. | V. Mabusenko | Designer | 1999 - 2000 | 2 | |
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