| McColeman, Kate | Kate McColeman | Actor | 1990 | 3 | |
| McDowell, Tina-Lisa | Tina-Lisa McDowell | Actor | 1990 | 1 | |
| Mallet, Sam | Sam Mallet | Actor, Composer, Musician | 1990 | 3 | |
| Mártha, István | István Mártha | Composer | 1991 | 1 | |
| Magyar, Fruzsina | Fruzsina Magyar | Dramaturg | 1991 - 2006 | 3 | |
| Milliken, Angie | Angie Milliken | Actor | 1991 | 1 | |
| McKenzie, Jacqueline | Jacqueline McKenzie | Actor | 1991 | 1 | |
| Mignon, Jean-Pierre | Jean-Pierre Mignon | Director | 1990 | 1 | |
| Matsuda, Youji | Youji Matsuda | Actor | 1990 | 1 | |
| Mitsubayashi, Kyoko | Kyoko Mitsubayashi | Actor | 1990 | 1 | |
| Mizushina, Takashi | Takashi Mizushina | Choreographer | 1990 | 1 | |
| Murúa, Guillermo | Guillermo Murúa | Producer | 1990 | 1 | |
| Millas, Marguerite | Marguerite Millas | Actor | 1990 | 1 | |
| McRobie, Brenda | Brenda McRobie | Director | 1990 | 1 | |
| Matalon, Muriel | Muriel Matalon | Actor | 1990 | 1 | |
| Markus, Tom | Tom Markus | Director | 1981 - 1991 | 2 | |
| Markovics, Karl | Karl Markovics | Actor | 1988 | 5 | |
| Müllner, Wolfgang | Wolfgang Müllner | Actor | 1988 | 5 | |
| Martini, Marion | Marion Martini | Actor | 1991 | 4 | |
| Martin, Walter | Walter Martin | Actor | 1956 | 1 | |
| Mühle, Örjan | Örjan Mühle | Mask Maker | 1991 - 1993 | 5 | |
| Martinu, Bohuslav | Bohuslav Martinu | Composer | 1991 - 1993 | 5 | |
| Mucchiano, Pia | Pia Mucchiano | Actor | 1991 - 1993 | 15 | |
| Magno, Rosa, Carlos | Rosa Carlos Magno | Costume Designer | 1952 - 1956 | 2 | |
| Molitor, Marion | Marion Molitor | Actor | 1956 | 1 | |
| Moog, Willy | Willy Moog | Director | 1953 - 1960 | 3 | |
| McCloskey, Michael | Michael McCloskey | Lighting Designer | 1956 | 1 | |
| Malone, Anne | Anne Malone | Actor | 1956 | 1 | |
| Marlowe, Margaret | Margaret Marlowe | Actor | 1956 | 1 | |
| Mcguinne, Sibeal | Sibeal Mcguinne | Actor | 1992 | 1 | |
| Major, Pamela | Pamela Major | Actor | 1992 - 2015 | 2 | |
| Manley, Donna | Donna Manley | Actor | 1992 | 1 | |
| Marques, António | António Marques | Actor | 1992 - 2015 | 2 | |
| Mickey, Susan E. | Susan E. Mickey | Costume Designer | 1992 | 1 | |
| Müller, Rudolf | Rudolf Müller | Sound Designer | 1992 | 1 | |
| Mounsey, Gordon | Gordon Mounsey | Actor | 1992 - 1994 | 2 | |
| Murnin, Michael J. | Michael J. Murnin | Designer, Lighting Designer | 1992 | 2 | |
| Mol, Arie de | Arie de Mol | Actor, Adaptation, Director | 1992 - 2009 | 71 | |
| Müller, Günther | Günther Müller | Actor | 1992 | 1 | |
| Marmor, David | David Marmor | Actor | 1992 | 1 | |
| Muldowney, Dominic | Dominic Muldowney | Composer | 1989 - 2016 | 3 | |
| Morgenroth, Daniel | Daniel Morgenroth | Actor | 1991 | 1 | |
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