| Music, Leila | Leila Music | Actor | 2002 | 1 | |
| Musik, Reinhard | Reinhard Musik | Actor | 1973 | 1 | |
| Mustakallio, Minttu | Minttu Mustakallio | Actor | 2002 | 1 | |
| Muszyński, Antoni | Antoni Muszyński | Designer | 1955 | 1 | |
| Muszynski, Gerd | Gerd Muszynski | Dramaturg | 2004 | 1 | |
| Mutalipassi, Loredana | Loredana Mutalipassi | Lighting Designer, Sound Designer | 2006 | 2 | |
| Mutino, Peter | Peter Mutino | Actor | 2008 | 1 | |
| Mutter, Johannita | Johannita Mutter | Costume Designer, Mask Maker | 2004 - 2014 | 3 | |
| Mutterlein, Leonore | Leonore Mutterlein | Actor | 1953 | 1 | |
| Muzzolon, Marco | Marco Muzzolon | Designer | 1999 | 1 | |
| Mwachiro, Kevin | Kevin Mwachiro | Actor | 2006 | 1 | |
| Mwakazi, Johnson | Johnson Mwakazi | Actor | 2006 | 1 | |
| Mwangala, Situmbeka | Situmbeka Mwangala | Actor | 2006 | 1 | |
| Myatt, Celinda | Celinda Myatt | Actor | 2003 | 1 | |
| Myers, Ben | Ben Myers | Actor | 2002 | 1 | |
| Myers, Danny | Danny Myers | Actor | 2004 | 1 | |
| Myers, Jamie | Jamie Myers | Actor | 2004 | 1 | |
| Myers, Roland | Roland Myers | Mask Maker | 1963 | 1 | |
| Myers, Scott | Scott Myers | Sound Designer | 1996 - 1997 | 3 | |
| Myles, Chris | Chris Myles | Actor | 2008 | 4 | |
| Mylrae, John | John Mylrae | Designer | 1939 | 1 | |
| Mylroy, Donna | Donna Mylroy | Actor | 1936 | 1 | |
| Molron, France | France Molron | Actor | 1975 - 1977 | 10 | |
| Madsen, Frederik | Frederik Madsen | Actor | 1876 - 1880 | 2 | |
| Machado, A. Reis | A. Reis Machado | Adaptation | 1990 | 1 | |
| 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 | | | | |
| Mizuno, Yu | Yu Mizuno | Actor | 2004 - 2013 | 20 | |
| 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 | |
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