| Mackenzie, Michael | Michael Mackenzie | Actor | 1975 - 1981 | 2 | |
| Matter, Franz | Franz Matter | Actor | 1972 - 1973 | 2 | |
| Maw, Janet | Janet Maw | Actor | 1979 | 2 | |
| Mayes, Richard | Richard Mayes | Actor | 1979 | 2 | |
| Morris, Peter | Peter Morris | Actor | 1961 - 1973 | 2 | 1 |
| Muceniece, Ilga | Ilga Muceniece | Actor | 1964 - 1975 | 2 | |
| Mason, Marshall W. | Marshall W. Mason | Director, Lighting Designer | 1964 - 1973 | 2 | |
| Miller, Carol | Carol Miller | Actor | 1976 - 1977 | 2 | |
| Medwed, Silva | Silva Medwed | Actor | 1970 - 1975 | 2 | |
| Minora, Lee | Lee Minora | Actor | 2014 | 2 | |
| Müller, Monika | Monika Müller | Actor | 1981 - 1987 | 2 | |
| Moffatt, Richard | Richard Moffatt | Lighting Designer | 1979 - 1986 | 2 | |
| Moss, Piotr | Piotr Moss | Composer | 1979 - 2012 | 2 | |
| Mills, Alison | Alison Mills | Actor | 1969 - 1972 | 2 | |
| Müller, Horst | Horst Müller | Actor | 1934 - 1972 | 2 | |
| Murphy, Peter | Peter Murphy | Actor | 1966 - 1976 | 2 | |
| Mittner, Karl | Karl Mittner | Actor | 1965 - 1981 | 2 | |
| Majewsky, Alexander | Alexander Majewsky | Actor | 1907 | 2 | |
| Moran, Ernst | Ernst Moran | Actor | 1910 - 1911 | 2 | |
| Mészáros, Lajos | Lajos Mészáros | Actor | 1914 - 1922 | 2 | |
| Molnár, László | László Molnár | Actor | 1914 - 1917 | 2 | |
| Mills, Harold | Harold Mills | Conductor, Musical Director | 1914 - 1921 | 2 | |
| MacCormack, Katherine | Katherine MacCormack | Actor | 1917 - 1918 | 2 | |
| Mahr, Alfred | Alfred Mahr | Actor | 1911 - 1917 | 2 | |
| Mihályi, Ernő | Ernő Mihályi | Actor | 1919 - 1944 | 2 | |
| Mitrevics, Augusts | Augusts Mitrevics | Actor | 1921 | 2 | |
| Martineau, Guy | Guy Martineau | Actor | 1922 - 1931 | 2 | |
| Mårtenson, Mona | Mona Mårtenson | Actor | 1924 - 1927 | 2 | |
| McIntyre, Heather | Heather McIntyre | Actor | 1925 | 2 | |
| Millington, W., R. | W. R. Millington | Actor | 1925 | 2 | |
| McMasters, Helen | Helen McMasters | Actor | 1925 | 2 | |
| McLoud, Donald | Donald McLoud | Actor | 1925 - 1926 | 2 | |
| Menadier, Arthur, M. | Arthur M. Menadier | Actor | 1925 - 1926 | 2 | |
| Martin Jr., W., E. | W. E. Martin Jr. | Actor | 1925 - 1926 | 2 | |
| Müller, Bertha | Bertha Müller | Actor | 1900 | 2 | |
| Martin, Dennis | Dennis Martin | Actor | 1928 | 2 | |
| Maxfield, Fru A., A. | Fru A. A. Maxfield | Costume Designer | 1928 | 2 | |
| McFedries, Sherman | Sherman McFedries | Actor | 1928 | 2 | |
| Michel, Barbara | Barbara Michel | Actor | 1983 - 1986 | 2 | |
| MacQuarrie, Don | Don MacQuarrie | Actor | 1972 - 1973 | 2 | |
| McIntyre, Jo-Ann | Jo-Ann McIntyre | Actor | 1972 - 1973 | 2 | |
| Meyer-Riehl, Anuschka | Anuschka Meyer-Riehl | Costume Designer | 1972 - 1991 | 2 | |
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