| Mezzorani , Maurizio | Maurizio Mezzorani | Actor | 2022 | 1 | |
| Melchinger, Gwendolyne | Gwendolyne Melchinger | Dramaturg | 2022 | 1 | |
| Mehltretter , Thomas | Thomas Mehltretter | Actor | 2022 | 1 | |
| Meyer, André | André Meyer | Actor | 2022 | 1 | |
| Martinoni, Giantonio | Giantonio Martinoni | Actor | 2022 | 2 | |
| Mastromonaco, Bianca | Bianca Mastromonaco | Actor | 2022 | 2 | |
| Moreno, María de los Ángeles | María de los Ángeles Moreno | Musical Director | 1965 | 1 | |
| Mingo, Bernardo | Bernardo Mingo | Special Effects | 1972 - 1975 | 6 | |
| Moreno, Antonio | Antonio Moreno | Actor | 1972 | 1 | |
| Mora, María del Carmen | María del Carmen Mora | Actor | 1972 | 1 | |
| Montes, Manuel Reyes | Manuel Reyes Montes | Actor, Designer | 2016 - 2018 | 7 | |
| Moreno, Emanuel | Emanuel Moreno | Actor, Musician | 2016 - 2017 | 5 | |
| Macua, Ángeles | Ángeles Macua | Actor | 1974 | 1 | |
| Medina, Laura | Laura Medina | Actor | 1974 | 1 | |
| Menéndez, Gerardo | Gerardo Menéndez | Musical Director | 1978 | 1 | |
| Maldonado, José Antonio | José Antonio Maldonado | Sound Designer | 1978 | 1 | |
| Muro, Pilar S. | Pilar S. Muro | Costume Designer | 1968 - 1969 | 2 | |
| Montero, Matías | Matías Montero | Costume Designer | 1968 | 1 | |
| Masulli, Alberto | Alberto Masulli | Choreographer | 1968 | 1 | |
| Molina, Romualdo | Romualdo Molina | Adaptation | 1971 | 1 | |
| Manrique, José Luis | José Luis Manrique | Actor | 1974 | 1 | |
| Mutiševa, Lora | Lora Mutiševa (Лора Мутишева) | Actor | 2022 | 1 | |
| Milčev, Michail | Michail Milčev (Михаил Милчев) | Actor | 2022 - 2023 | 2 | |
| Moreno, Matilde | Matilde Moreno | Actor | 1982 | 1 | |
| Moragas, Miquel | Miquel Moragas | Set Designer | 1903 - 1906 | 2 | |
| Macol, Elka | Elka Macol (Елка Мацол) | Actor | 1938 | 1 | |
| McDonald, Keegan | Keegan McDonald | Actor | 2015 | 1 | |
| Meregalli, Andrea | Andrea Meregalli | Translator | 2022 | 1 | |
| Mungiguerra, Piera | Piera Mungiguerra | Dramaturg | 2022 | 1 | |
| Mazzarino, Giulia | Giulia Mazzarino | Actor | 2022 | 1 | |
| Mercier, Skip | Skip Mercier | Set Designer | 2018 | 1 | |
| Mancarella, Philip | Philip Mancarella | Musician | 2022 | 1 | |
| Melo, João | João Melo | Actor | 2021 | 1 | |
| Molgosa, Mrs. | Mrs. Molgosa | Actor | 1907 | 1 | |
| Mr. Bové | Mr. Bové | Actor | 1913 | 1 | |
| Munt, Mr. | Mr. Munt | Actor | 1913 | 1 | |
| Mentes, Júlia | Júlia Mentes | Actor | 2023 | 2 | |
| Mundet, Agustín | Agustín Mundet | Translator | 1918 - 1925 | 7 | |
| Morano, Francisco | Francisco Morano | Actor | 1920 | 1 | |
| Marsal, Mrs. | Mrs. Marsal | Actor | 1922 | 1 | |
| Moragas, Carmen | Carmen Moragas | Actor | 1923 | 1 | |
| Morales, Mercedes | Mercedes Morales | Actor | 1925 | 1 | |
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