| Myridou, Veta | Veta Myridou | Musical Director | 1975 | 4 | |
| Mittreiter, Kurt | Kurt Mittreiter | Costume Designer, Designer | 1967 - 1973 | 4 | |
| May, Deborah | Deborah May | Actor, Author | 1976 - 1977 | 4 | |
| Maurer, Marie, von | Marie von Maurer | Actor | 1900 - 1912 | 4 | |
| Manninen, O. | Otto Manninen | Translator | 1916 - 1967 | 4 | |
| Markeng, Johannes | Johannes Markeng | Costume Designer | 1981 | 4 | |
| McGovern, John | John McGovern | Actor | 1923 - 1924 | 4 | |
| McNamara, George | George McNamara | Actor, Dancer | 1923 - 1924 | 4 | |
| Mulholland, Kathryn | Kathryn Mulholland | Actor | 1923 - 1924 | 4 | |
| Müller-Elmau, Eberhard | Eberhard Müller-Elmau | Actor, Director | 1960 - 1981 | 4 | |
| Mikes, Lajos | Lajos Mikes | Translator | 1927 - 1944 | 4 | |
| Marzolf, Leslie | Leslie Marzolf | Costume Designer, Designer | 1928 - 1929 | 4 | |
| Mastroianni, Marcello | Marcello Mastroianni | Actor | 1972 - 1973 | 4 | |
| Meyer, Willy | Willy Meyer | Actor | 1909 - 1912 | 4 | |
| Milly | Milly - | Actor | 1939 | 4 | |
| Myrat, Miranta | Miranta Myrat | Actor | 1934 - 1944 | 4 | |
| Molnár, Zsuzsa | Zsuzsa Molnár | Actor | 1983 - 1991 | 4 | |
| Meier, Ingrid | Ingrid Meier | Actor | 1983 | 4 | |
| Margot, François | François Margot | Actor, Musician | 1996 - 1998 | 4 | |
| Mesgarha, Ahmad | Ahmad Mesgarha | Actor | 2004 - 2010 | 4 | 3 |
| Maglajlić, Lada | Lada Maglajlić | Designer | 2009 | 4 | |
| Moreno, Alexis | Alexis Moreno | Actor, Adaptation | 2012 - 2018 | 4 | |
| Maltar, Zlatko | Zlatko Maltar | Actor | 2013 - 2016 | 4 | 1 |
| Mehring, Oscar | Oscar Mehring | Actor | 1904 - 1907 | 4 | |
| Mitterer, Susanne | Susanne Mitterer | Actor | 1985 - 2006 | 4 | |
| Mader, Leonhard | Leonhard Mader | Actor | 1985 | 4 | |
| Maier, Henriette | Henriette Maier | Actor | 1980 - 1985 | 4 | |
| Michel, Jacqueline | Jacqueline Michel | Actor | 1985 | 4 | |
| Maschek, Siegfried | Siegfried Maschek | Actor | 1987 - 2016 | 4 | 1 |
| Manevarthe, Jagadeesh | Jagadeesh Manevarthe | Actor | 1995 | 4 | |
| Mahadeva | - Mahadeva | Actor | 1995 | 4 | |
| Masuth, Christian | Christian Masuth | Designer, Translator | 1990 - 2001 | 4 | |
| Martinsson, Lars | Lars Martinsson | Actor | 1990 | 4 | |
| Messaline, Peter | Peter Messaline | Actor | 1991 | 4 | |
| Martini, Marion | Marion Martini | Actor | 1991 | 4 | |
| Muizelaar, Titus | Titus Muizelaar | Actor, Director | 1971 - 1992 | 4 | |
| Mitev, Slavtscho | Slavtscho Mitev | Actor | 1971 - 1988 | 4 | |
| Minetti, Bernhard | Bernhard Minetti | Actor | 1937 - 1992 | 4 | |
| Mavropoulou, Gkely | Gkely Mavropoulou | Actor | 1958 - 1982 | 4 | |
| Monahan, Kathy | Kathy Monahan | Actor | 1993 | 4 | |
| Morcsányi, Géza | Géza Morcsányi | Dramaturg | 1993 - 2013 | 4 | |
| Moutsopoulou, Lila | Lila Moutsopoulou | Actor | 1991 | 4 | |
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