| Martin, Gundula | Gundula Martin (Gundula Martin) | Costume Designer, Designer | 1987 - 2014 | 3 | |
| Martin, Klaus | Klaus Martin (Klaus Martin) | Actor, Lighting Designer, Sound Designer | 1986 - 1999 | 3 | |
| Maslon, Laurence | Laurence Maslon (Laurence Maslon) | Dramaturg | 1985 - 1995 | 3 | |
| Mason, Dan | Dan Mason (Dan Mason) | Actor | 1996 - 2013 | 3 | |
| Matveeva, Svetlana | Svetlana Matveeva (Svetlana Matveeva) | Actor, Costume Designer, Designer | 2001 | 3 | |
| Matysová, Milada | Milada Matysová (Milada Matysová) | Actor | 1939 - 1954 | 3 | |
| Matz, Katharina | Katharina Matz (Katharina Matz) | Actor | 1956 - 1985 | 3 | |
| Mavromataki, Kelly | Kelly Mavromataki (Kelly Mavromataki) | Costume Designer | 2006 | 3 | |
| McCallum, Paul | Paul McCallum (Paul McCallum) | Actor | 1970 | 3 | |
| McCoy, Michael | Michael McCoy (Michael McCoy) | Sound Designer | 1992 | 3 | |
| McHallem, Christopher | Christopher McHallem (Christopher McHallem) | Actor | 1992 | 3 | |
| McRae, Hilton | Hilton McRae (Hilton McRae) | Actor | 1993 - 2003 | 3 | |
| McTeer, Janet | Janet McTeer (Janet McTeer) | Actor | 1996 - 1997 | 3 | 2 |
| Medina, Estela | Estela Medina (Estela Medina) | Actor | 1954 - 1979 | 3 | |
| Mehring, Horst | Horst Mehring (Horst Mehring) | Actor | 1971 - 1975 | 3 | |
| Mehrjui, Dariush | Dariush Mehrjui (Dariush Mehrjui) | Director, Producer | 1993 - 2014 | 3 | |
| Melldahl, Åsa | Åsa Melldahl (Åsa Melldahl) | Director | 2000 - 2007 | 3 | |
| Mellor, Harold | Harold Mellor (Harold Mellor) | Actor | 1963 - 1977 | 3 | |
| Metcalfe, Edgar | Edgar Metcalfe (Edgar Metcalfe) | Director | 1970 | 3 | |
| Meunier, Enny | Enny Meunier (Enny Meunier) | Actor | 1955 - 1977 | 3 | |
| Meyer, Wilhelm | Wilhelm Meyer (Wilhelm Meyer) | Actor | 1976 - 1980 | 3 | |
| Micińska, Magdalena | Magdalena Micińska (Magdalena Micińska) | Actor | 1882 - 1908 | 3 | |
| Miles, Katrina | Katrina Miles (Katrina Miles) | Actor | 2005 - 2006 | 3 | |
| Millot, Charles | Charles Millot (Charles Millot) | Actor | 1957 - 1980 | 3 | |
| Minot, Anna | Anna Minot (Anna Minot) | Actor | 1950 - 1995 | 3 | |
| Mochizuki, Michiharu | Michiharu Mochizuki (Michiharu Mochizuki) | Actor | 1983 - 1994 | 3 | |
| Modén, Mirja | Mirja Modén (Mirja Modén) | Actor | 1989 - 1991 | 3 | |
| Mooney, Ria | Ria Mooney (Ria Mooney) | Actor | 1923 - 1925 | 3 | |
| Moore, Mary | Mary Moore (Mary Moore) | Costume Designer, Designer | 1989 - 1990 | 3 | |
| Morelli, Richard | Richard Morelli (Richard Morelli) | Director | 1949 - 1959 | 3 | |
| Morrow, Helen | Helen Morrow (Helen Morrow) | Actor | 1929 | 3 | |
| Moser, Wolfgang | Wolfgang Moser (Wolfgang Moser) | Designer | 1960 - 1977 | 3 | |
| Mueller, Johannes | Johannes Mueller (Johannes Mueller) | Sound Designer | 2006 | 3 | |
| Müller, Gert | Gert Müller (Gert Müller) | Composer, Dramaturg | 1981 - 1996 | 3 | |
| Müller, Manfred | Manfred Müller (Manfred Müller) | Actor | 1965 - 1982 | 3 | |
| Müller, Ursula | Ursula Müller (Ursula Müller) | Costume Designer, Dancer, Designer | 1956 - 1995 | 3 | |
| Murakami, Satomi | Satomi Murakami (Satomi Murakami) | Actor | 2006 - 2008 | 3 | |
| Murase, Sachiko | Sachiko Murase (Sachiko Murase) | Actor | 1928 - 1976 | 3 | |
| Murphy, John | John Murphy (John Murphy) | Actor | 1971 - 2000 | 3 | |
| Murtagh-Monks, Annie | Annie Murtagh-Monks (Annie Murtagh-Monks) | Actor | 1982 - 1991 | 3 | |
| Mutter, Johannita | Johannita Mutter (Johannita Mutter) | Costume Designer, Mask Maker | 2004 - 2014 | 3 | |
| Myers, Scott | Scott Myers (Scott Myers) | Sound Designer | 1996 - 1997 | 3 | |
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