| Morgan, Robert | Robert Morgan | Costume Designer | 1974 - 1979 | 3 | |
| Magee, Patrick | Patrick Magee | Actor | 1959 - 1974 | 3 | |
| Mari, Roberto | Roberto Mari | Actor | 1974 | 3 | |
| Mari, Franco | Franco Mari | Actor | 1974 | 3 | |
| Maniscalco, Gioacchino | Gioacchino Maniscalco | Actor | 1974 | 3 | |
| Meltzer, Hermann | Hermann Meltzer | Actor | 1893 - 1905 | 3 | |
| McKenzie, Sandra | Sandra McKenzie | Actor, Composer | 1961 - 1976 | 3 | |
| Mellies, Otto | Otto Mellies | Actor | 1975 - 1991 | 3 | |
| Mattes, Eva | Eva Mattes | Actor | 1973 - 1975 | 3 | |
| Meußling, Sabine | Sabine Meußling | Actor | 2013 - 2014 | 3 | |
| Marshall, E.G. | E.G. Marshall | Actor | 1960 - 1980 | 3 | |
| Marshall, Peggy | Peggy Marshall | Actor | 1975 - 1979 | 3 | |
| Mücke, Annelies | Annelies Mücke | Actor | 1961 - 1973 | 3 | |
| Müller, Hans-Reinhard | Hans-Reinhard Müller | Actor, Director | 1975 - 1979 | 3 | |
| Matousch, Stefan | Stefan Matousch | Actor | 2006 - 2015 | 3 | |
| Massara, Pino | Pino Massara | Composer | 1975 - 1976 | 3 | |
| Monteiro, Luís, de Sttau | Luís de Sttau Monteiro | Adaptation, Director, Translator | 1972 | 3 | |
| Mercatali, Magda | Magda Mercatali | Actor | 1969 - 1981 | 3 | |
| Maxence, Pierre | Pierre Maxence | Actor, Director, Translator | 1972 - 1976 | 3 | |
| Momme, Anders | Anders Momme | Actor | 2013 | 3 | |
| Mehabil, Lila, Nobel | Lila Nobel Mehabil | Actor | 2013 | 3 | |
| Meinhardt, Thomas | Thomas Meinhardt | Actor | 1981 - 2010 | 3 | 1 |
| Morahan, Christopher | Christopher Morahan | Director | 1958 - 1979 | 3 | |
| Mautz, Rolf | Rolf Mautz | Actor | 1976 - 1993 | 3 | |
| Mandri, Heino | Heino Mandri | Actor | 1962 - 1989 | 3 | |
| Meyveldt, Georg | Georg Meyveldt | Actor | 1908 | 3 | |
| Morocutti, Camillo | Camillo Morocutti | Actor | 1910 - 1917 | 3 | |
| Morita, Sohei | Sohei Morita | Translator | 1913 - 1940 | 3 | |
| Mačs, Emils | Emils Mačs | Actor | 1921 | 3 | |
| Marshall, Armina | Armina Marshall | Actor | 1923 - 1931 | 3 | |
| Maude, Joan | Joan Maude | Actor | 1925 - 1932 | 3 | |
| Menefee, Richard | Richard Menefee | Actor, Director | 1928 - 1929 | 3 | |
| McDermid, Finlay | Finlay McDermid | Actor | 1928 - 1929 | 3 | |
| Mathisen, Svanhild | Svanhild Mathisen | Actor | 1928 | 3 | |
| Mitschkowski, Artur | Artur Mitschkowski | Actor | 1909 - 1912 | 3 | |
| Mariouklas, Nikos | Nikos Mariouklas | Actor | 1972 - 1990 | 3 | |
| Mommsen, Karin | Karin Mommsen | Actor | 1970 - 1986 | 3 | |
| Marks, Hagen | Hagen Marks | Actor | 1983 - 2001 | 3 | |
| Marcell, Peter | Peter Marcell | Actor | 1964 - 1983 | 3 | |
| Munch-Møller, Asger | Asger Munch-Møller | Actor, Translator | 1983 - 1990 | 3 | |
| Mejstrik, Kurt | Kurt Mejstrik | Actor | 1969 - 1975 | 3 | |
| Mitropoulou, Kaiti | Kaiti Mitropoulou | Actor | 1980 - 1992 | 3 | |
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