| Marii, Ştefan | Ştefan Marii | Actor | 1970 | 1 | |
| McKenna, Seana | Seana McKenna | Actor | 2016 - 2020 | 2 | |
| Manta, Ion | Ion Manta | Actor | 1943 - 1976 | 3 | |
| Mason. Tessa | Tessa Mason | Actor | 2016 | 1 | |
| Mogoş, Romeo | Romeo Mogoş | Actor | 1968 | 1 | |
| Moore, Catherine | Catherine Moore | Actor | 2016 | 1 | |
| Moore, Thomas Constantine | Thomas Constantine Moore | Actor | 2016 | 1 | |
| Moldovan, Gheorghe | Gheorghe Moldovan | Actor | 1978 - 1995 | 2 | |
| Motoi, Giliola | Giliola Motoi | Actor | 1995 | 1 | |
| Makkonen, Aino | Aino Makkonen | Costume Designer | 1956 | 1 | |
| Masson, Gust | Gust Masson | Mask Maker | 1956 - 1957 | 3 | |
| Markey, Jolande | Jolande Markey | Actor | 1956 - 1957 | 6 | |
| Maeremans, G. | G. Maeremans | Actor | 1956 - 1957 | 3 | |
| Mertens, J. | J. Mertens | Actor | 1956 - 1957 | 3 | |
| Meyer-Bruhns, Luise | Luise Meyer-Bruhns | Actor | 1956 | 1 | |
| Mewes, Ingund | Ingund Mewes | Actor | 1956 | 1 | |
| Müller, Hanns | Hanns Müller | Actor | 1956 | 2 | |
| Mandric, Emil | Emil Mandric | Director | 1973 | 1 | |
| Moruzan, Dem. | Dem. Moruzan | Actor | 1956 | 1 | |
| Meierhofer, Felix | Felix Meierhofer | Actor | 1956 | 2 | |
| Mercs, Ēvalds | Ēvalds Mercs | Actor, Director | 1941 - 1956 | 3 | |
| Marmeliuc, Lia | Lia Marmeliuc | Translator | 1957 - 1967 | 2 | |
| Musceleanu, George | George Musceleanu | Actor | 1957 | 1 | |
| Mureşanu, Vasile | Vasile Mureşanu | Actor | 1967 | 1 | |
| Marinescu-Kanya, Marina | Marina Marinescu-Kanya | Actor | 1973 | 1 | |
| Mihăescu, Vasile | Vasile Mihăescu | Actor | 1978 | 1 | |
| Molocea, Constantin | Constantin Molocea | Costume Designer, Designer | 1993 | 2 | |
| Monroe, Kimber | Kimber Monroe | Actor | 2016 | 1 | |
| Mazel, Otto | Otto Mazel | Actor | 1916 - 1918 | 4 | |
| Meinrad, Lia | Lia Meinrad | Actor | 1916 - 1918 | 2 | |
| Milione, Alyssa | Alyssa Milione | Lighting Designer | 2016 | 1 | |
| Marber, Patrick | Patrick Marber | Adaptation, Translator | 2016 - 2022 | 5 | |
| Magyar, Éva | Éva Magyar | Actor | 2016 - 2018 | 27 | |
| Meng, Tong | Tong Meng | Actor | 2014 - 2016 | 5 | |
| Montonen, Uuno | Uuno Montonen | Actor | 1935 - 1955 | 2 | |
| Magnusson, Georg | Georg Magnusson | Designer | 1955 - 1958 | 2 | |
| Malmberg, Otto | Otto Malmberg | Actor | 1952 - 1955 | 3 | |
| Maylor, Ella | Ella Maylor | Actor | 1917 | 1 | |
| Moulder, Ryan | Ryan Moulder | Actor | 1998 | 1 | |
| Morbillo, Angelo | Angelo Morbillo | Actor | 1998 | 1 | |
| Maccagno, Stefano | Stefano Maccagno | Composer | 1998 | 1 | |
| Maggi, Simona | Simona Maggi | Choreographer | 1998 | 1 | |
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