| Mantius, Karlheinz | Karlheinz Mantius | Actor | 1964 - 1973 | 2 | |
| Marin, Hans | Hans Marin | Actor | 1973 - 1988 | 2 | |
| Maron, Hanna | Hanna Maron | Actor | 1959 - 1966 | 2 | |
| Martin, Bob | Bob Martin | Lighting Designer, Sound Designer | 1990 | 2 | |
| Mascus, Hella-Birgit | Hella-Birgit Mascus | Actor | 1989 - 1990 | 2 | |
| Matela, Kimberly | Kimberly Matela | Costume Designer | 2006 | 2 | |
| Matikainen, Osmo | Osmo Matikainen | Actor | 1983 - 2006 | 2 | |
| Matsui, Sumako | Sumako Matsui | Actor | 1914 | 2 | |
| Matsumoto, Kappei | Kappei Matsumoto | Actor | 1934 - 1978 | 2 | |
| Matthias, Peter | Peter Matthias | Actor | 1975 - 1992 | 2 | |
| Mátyás, Jolán | Jolán Mátyás | Actor | 1965 - 1969 | 2 | |
| Matzkanin, Mark | Mark Matzkanin | Lighting Designer | 1990 - 2007 | 2 | |
| Mauhs, Else | Else Mauhs | Actor | 1925 - 1928 | 2 | 1 |
| May, Eberhard | Eberhard May | Actor | 1975 - 1997 | 2 | |
| McCarthy, Eoin | Eoin McCarthy | Actor | 2000 - 2003 | 2 | 1 |
| McCracken, Everett | Everett McCracken | Composer | 1928 | 2 | |
| McMahon, Charles | Charles McMahon | Actor, Director | 1999 - 2005 | 2 | 1 |
| McSweeney, Kevin | Kevin McSweeney | Director | 2001 | 2 | |
| McWilliams, Jack | Jack McWilliams | Actor | 1928 | 2 | |
| Meeker, Dan | Dan Meeker | Designer, Lighting Designer | 2003 | 2 | |
| Meister, Karel | Karel Meister | Actor | 1961 - 1966 | 2 | |
| Melchert, Arne | Arne Melchert | Actor | 1924 - 1944 | 2 | |
| Mendes, Manuel | Manuel Mendes | Actor | 1993 - 2004 | 2 | |
| Mian, Daniel | Daniel Mian | Actor | 2004 - 2012 | 2 | |
| Michael, Pierre | Pierre Michael | Actor | 1976 - 1980 | 2 | |
| Michaelis, Ruscha | Ruscha Michaelis | Actor | 1897 - 1898 | 2 | |
| Migliardi, Mario | Mario Migliardi | Composer | 1974 | 2 | |
| Mihai, Mihaela | Mihaela Mihai | Actor | 2006 | 2 | |
| Miiros, Annika | Annika Miiros | Actor | 1980 - 1986 | 2 | |
| Militaru, Sorin | Sorin Militaru | Director | 2006 | 2 | 1 |
| Minguell, Josep | Josep Minguell | Actor | 1988 - 1997 | 2 | |
| Mirnik, Cveta | Cveta Mirnik | Costume Designer | 1979 - 1986 | 2 | |
| Modrzejewska, Helena | Helena Modrzejewska | Actor | 1882 - 1885 | 2 | 2 |
| Moe, Stig-Werner | Stig-Werner Moe | Actor | 1992 - 1996 | 2 | |
| Mohamed, Makbul | Makbul Mohamed | Actor | 2005 - 2006 | 2 | |
| Mohr, Betty | Betty Mohr | Actor | 1934 - 1935 | 2 | |
| Molander, Gustaf | Gustaf Molander | Actor | 1921 - 1925 | 2 | 1 |
| Moldovan, Dorothea | Dorothea Moldovan | Actor | 2006 | 2 | |
| Montagna, Carlo | Carlo Montagna | Actor | 1974 | 2 | |
| Moore, John | John Moore | Actor | 1957 - 1962 | 2 | 1 |
| Moreno, Mireya | Mireya Moreno | Actor | 2006 - 2011 | 2 | |
| Morgen, Gisela | Gisela Morgen | Actor | 1951 - 1964 | 2 | |
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