| Meussen, Gerard | Gerard Meussen (Gerard Meussen) | Actor | 1923 | 1 | |
| Mihalesco, M. | M. Mihalesco (M. Mihalesco) | Actor, Director | 1924 | 2 | |
| Mizoguchi, Saburo | Saburo Mizoguchi (Saburo Mizoguchi) | Designer | 1924 - 1928 | 2 | |
| Moore, Frank | Frank Moore (Frank Moore) | Actor | 1913 - 1928 | 4 | |
| Methling, Svend | Svend Methling (Svend Methling) | Actor, Adaptation, Designer, Director | 1921 - 1964 | 9 | |
| Madsen-Wiesneck, J. | J. Madsen-Wiesneck (J. Madsen-Wiesneck) | Designer | 1924 - 1934 | 2 | |
| Mathorne, C. | C. Mathorne (C. Mathorne) | Designer | 1924 | 1 | |
| Michelsen, Randi | Randi Michelsen (Randi Michelsen) | Actor | 1924 - 1960 | 4 | |
| Mjøen, Sonja | Sonja Mjøen (Sonja Mjøen) | Actor | 1924 | 1 | |
| Moseley, Kathleen | Kathleen Moseley (Kathleen Moseley) | Actor | 1924 - 1926 | 2 | |
| Makó, Aida | Aida Makó (Aida Makó) | Actor | 1924 | 1 | |
| Magnúsdóttir, Lara | Lara Magnúsdóttir (Lara Magnúsdóttir) | Actor | 1924 | 1 | |
| Mihalesco, Mr. | Mr. Mihalesco | Actor | 1925 - 1934 | 4 | |
| Malmquist, Sandro | Sandro Malmquist | Designer, Director, Translator | 1925 - 1961 | 90 | |
| Millander, Sven | Sven Millander | Actor | 1925 | 1 | |
| Milton, Ernest | Ernest Milton | Actor, Director | 1925 - 1930 | 8 | |
| Morley, Malcolm | Malcolm Morley | Actor, Designer, Director | 1925 - 1933 | 10 | |
| Medved, Cirila | Cirila Medved | Actor | 1925 | 1 | |
| Márkus, László | László Márkus | Designer, Director, Translator | 1925 - 1948 | 3 | |
| Mágori, Mária | Mária Mágori | Actor | 1924 - 1943 | 53 | |
| Monck, Nugent | Nugent Monck | Director | 1925 - 1928 | 3 | |
| Machat, Sidney | Sidney Machat | Actor | 1925 - 1926 | 3 | |
| Mindell, Fania | Fania Mindell | Costume Designer | 1926 | 1 | |
| Mielziner, Jo | Jo Mielziner | Costume Designer, Designer | 1925 - 1932 | 5 | |
| Menken, Helen | Helen Menken | Actor | 1926 | 1 | |
| Mitchell, Mrs. | Mrs. Mitchell | Actor | 1926 | 1 | |
| Moulton, Harold | Harold Moulton | Actor | 1926 - 1929 | 3 | |
| Matthews, Ross | Ross Matthews | Actor | 1926 | 1 | |
| Morris, Ann | Ann Morris | Actor | 1926 | 1 | |
| McMahon, Gregan | Gregan McMahon | Actor, Producer | 1926 - 1933 | 4 | |
| Mezzanotte, A. | A. Mezzanotte | Actor | 1892 - 1894 | 8 | |
| Mugnaini, A. | A. Mugnaini | Actor | 1892 - 1894 | 8 | |
| Mula, Tom | Tom Mula | Actor | 1972 | 1 | |
| Miller, Jonathan | Jonathan Miller | Director | 1974 | 1 | |
| McNutt, Patterson | Patterson McNutt | Producer | 1926 - 1927 | 7 | |
| Masson, William C. | William C. Masson | Actor | 1926 - 1927 | 6 | |
| Miller, Antha | Antha Miller | Actor | 1927 | 1 | |
| Maloberti, Tiziana | Tiziana Maloberti | Actor | 1927 | 1 | |
| Martini, Rodolfo | Rodolfo Martini | Actor | 1927 | 1 | |
| Maneva, Petja | Petja Maneva | Actor | 1974 | 1 | |
| Metscheva, Liljana | Liljana Metscheva | Director | 1974 | 1 | |
| Mann, Martha | Martha Mann | Costume Designer, Designer | 1974 - 1978 | 2 | |
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