| Morgan, William, R. | William R. Morgan | Director | 1964 | 1 | 1 |
| McNenny, Kathleen | Kathleen McNenny | Actor | 2012 | 1 | 1 |
| McManus, Patrick | Patrick McManus | Actor | 2012 | 1 | 1 |
| McCarthy, Michael | Michael McCarthy | Composer, Dramaturg | 2012 - 2020 | 3 | 1 |
| Manninen, Mauno | Mauno Manninen | Designer, Director | 1951 - 1962 | 4 | 1 |
| Machens, Franziska | Franziska Machens | Actor | 2012 - 2014 | 2 | 1 |
| Miller, Mary | Mary Miller | Actor | 1962 | 2 | 1 |
| Malmsten, Birger | Birger Malmsten | Actor | 1961 | 1 | 1 |
| Marti, Nina | Nina Marti | Actor | 2012 | 1 | 1 |
| MacGrath, Leueen | Leueen MacGrath | Actor | 1961 | 1 | 1 |
| Marino, Joseph | Joseph Marino | Actor | 1961 | 1 | 1 |
| McQuade, John | John McQuade | Actor | 1961 | 1 | 1 |
| Melnikova, Darya | Darya Melnikova | Actor | 2012 | 1 | 1 |
| Mjøen, Fridtjof | Fridtjof Mjøen | Actor | 1945 - 1960 | 5 | 1 |
| March, Lori | Lori March | Actor | 1960 | 1 | 1 |
| Møller, Christen | Christen Møller | Actor, Adaptation, Director | 1934 - 1964 | 4 | 1 |
| Miranda, Lucía | Lucía Miranda | Adaptation, Director | 2015 - 2017 | 28 | 1 |
| Moniri, Nina | Nina Moniri | Actor | 2013 | 1 | 1 |
| Manten, Martine | Martine Manten | Adaptation, Dramaturg | 2012 - 2013 | 58 | 1 |
| Marian, B. | B. Marian | Translator | 1901 | 2 | 1 |
| March, Rosalind | Rosalind March | Actor | 1977 - 2013 | 2 | 1 |
| Moore, Max, Gordon | Max Gordon Moore | Actor | 2013 | 1 | 1 |
| McGoohan, Patrick | Patrick McGoohan | Actor | 1959 | 2 | 1 |
| McFarland, Olive | Olive McFarland | Actor | 1959 | 2 | 1 |
| McCarthy, Mary | Mary McCarthy | Actor | 1959 | 1 | 1 |
| Mowls, Shirley | Shirley Mowls | Actor | 1959 | 1 | 1 |
| Mellvig, Börje | Börje Mellvig | Actor, Director | 1936 - 1958 | 5 | 1 |
| McDonald, Hugh | Hugh McDonald | Actor | 1958 | 1 | 1 |
| McDonald, Peg | Peg McDonald | Actor | 1958 | 1 | 1 |
| Malkin, B. | B. Malkin | Director | 1957 | 1 | 1 |
| Morton, Clive | Clive Morton | Actor | 1957 - 1958 | 2 | 1 |
| Moe, Ove | Ove Moe | Actor | 1953 - 1956 | 2 | 1 |
| Moreno, Ricardo | Ricardo Moreno | Designer, Lighting Designer | 1956 | 2 | 1 |
| Marinkovic, Rados | Rados Marinkovic | Costume Designer | 1956 | 1 | 1 |
| Marber, Patrick Albert Crispin | Patrick Albert Crispin Marber | Adaptation, Translator | 2016 - 2023 | 7 | 1 |
| Macdonald, Murray | Murray Macdonald | Director | 1955 | 1 | 1 |
| Mittler, Leo | Leo Mittler | Director | 1953 | 1 | 1 |
| Meysel, Inge | Inge Meysel | Actor | 1953 | 1 | 1 |
| Middleton, Robert | Robert Middleton | Actor | 1951 | 1 | 1 |
| March, Fredric | Fredric March | Actor | 1950 | 1 | 1 |
| Maurice, Joël | Joël Maurice | Actor | 2000 | 1 | 1 |
| Maccie, Liz | Liz Maccie | Actor | 1998 - 1999 | 2 | 1 |
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