| 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 | |
| Moser, Käte | Käte Moser | Actor | 1933 | 2 | |
| Martyn, Greg | Greg Martyn | Actor | 1983 | 2 | |
| Mirbach, Ingrid | Ingrid Mirbach | Actor | 1983 - 1984 | 2 | |
| Marme, Philippe | Philippe Marme | Actor | 1972 | 2 | |
| Myin, Hervé | Hervé Myin | Actor | 1972 | 2 | |
| Meinertzhagen, Josef | Josef Meinertzhagen | Actor | 1959 - 1972 | 2 | |
| Mann, Euland | Euland Mann | Actor | 1933 - 1934 | 2 | |
| Masters, Robert | Robert Masters | Actor, Designer | 1933 - 1936 | 2 | |
| Møller, Paul | Paul Møller | Actor | 1957 - 1983 | 2 | |
| Mohn, Margaret | Margaret Mohn | Actor, Director | 1948 | 2 | |
| McGookin, Colin | Colin McGookin | Designer | 1983 | 2 | |
| Murdoch, Alan | Alan Murdoch | Composer | 1983 | 2 | |
| McAlister, Evelyn | Evelyn McAlister | Actor | 1983 | 2 | |
| Mulvenna, Declan | Declan Mulvenna | Actor | 1983 | 2 | |
| Mirski, Krastjo | Krastjo Mirski | Director, Translator | 1956 | 2 | |
| Mühler, Peter | Peter Mühler | Designer | 1958 - 1962 | 2 | |
| Madl, Ferdinand | Ferdinand Madl | Costume Designer | 1958 - 1962 | 2 | |
| Morley, Carol | Carol Morley | Actor | 1978 - 1988 | 2 | |
| Méndez, José | José Méndez | Costume Designer, Designer | 1981 | 2 | |
| Magálová, Kamila | Kamila Magálová | Actor | 1972 - 1983 | 2 | |
| Matus, György | György Matus | Actor | 1983 - 1988 | 2 | |
| Minkov, Margarit | Margarit Minkov | Adaptation, Director | 1991 | 2 | |
| Mankovecký, Róbert | Róbert Mankovecký | Composer, Dramaturg | 1993 | 2 | |
| Morley, Christopher | Christopher Morley | Costume Designer, Designer | 1983 | 2 | |
| Myklestad, Willy | Willy Myklestad | Lighting Designer | 1983 - 1988 | 2 | |
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