| Masters, Robert | Robert Masters | Actor, Designer | 1933 - 1936 | 2 | |
| Masterson, Carl | Carl Masterson | Actor | 2016 - 2020 | 3 | |
| Masterson, Dorothy | Dorothy Masterson | Actor | 1954 | 1 | |
| Mastin, Dawn | Dawn Mastin | Actor | 1969 | 2 | |
| Mastoras, Michalis | Michalis Mastoras | Actor | 1939 | 2 | |
| Mastoropoulou, Agathoniki | Agathoniki Mastoropoulou | Actor | 1899 | 1 | |
| Mastrantoni, Augusto | Augusto Mastrantoni | Actor | 1954 | 1 | |
| Mastrantonio, Mary Elizabeth | Mary Elizabeth Mastrantonio | Actor | 2022 | 1 | |
| Mastroianni, Marcello | Marcello Mastroianni | Actor | 1972 - 1973 | 4 | |
| Mastroianni, Stefania | Stefania Mastroianni | Actor | 2024 | 1 | |
| Mastromonaco, Bianca | Bianca Mastromonaco | Actor | 2022 | 2 | |
| Mastropasqua, Sergio | Sergio Mastropasqua | Actor | 2022 - 2024 | 7 | |
| Mastrosavas, Max | Max Mastrosavas | Actor | 1986 | 1 | |
| Masuch, Bettina | Bettina Masuch | Actor | 1985 | 1 | |
| Masuch, Sarah | Sarah Masuch | Actor | 2001 - 2004 | 4 | 1 |
| Masud, - | - Masud | Actor | 2006 | 1 | |
| Masulli, Alberto | Alberto Masulli | Choreographer | 1968 | 1 | |
| Masum, Farhad Uddin | Farhad Uddin Masum | Designer | 2009 | 1 | |
| Masumoto, Kiyoshi | Kiyoshi Masumoto | Director | 1912 | 1 | |
| Masumoto, Tatsuya | Tatsuya Masumoto | Actor | 2009 | 1 | |
| Masur, Ken-David | Ken-David Masur | Conductor | 2017 - 2022 | 2 | |
| Masur, Richard | Richard Masur | Actor | 1972 | 1 | |
| Masure, Florence | Florence Masure | Actor | 2010 - 2013 | 17 | |
| Masutani, Kyoko | Kyoko Masutani | Actor | 2008 | 2 | |
| Masuth, Christian | Christian Masuth | Designer, Translator | 1990 - 2001 | 4 | |
| Masuth, Leo | Leo Masuth | Actor | 1970 | 2 | |
| Masuth, Matthias | Matthias Masuth | Director | 1982 | 1 | |
| Masuyama, Yoshihiko | Yoshihiko Masuyama | Designer | 1967 | 1 | |
| Maszlay, István | István Maszlay | Actor | 2004 | 1 | |
| Maszyński, Mariusz | Mariusz Maszyński | Actor | 1920 | 1 | |
| Mata Ramos, Andrés | Andrés Mata Ramos | Director | 2008 | 1 | |
| Mata, Dina | Dina Mata | Designer | 1998 | 1 | |
| Mata, José | José Mata | Actor | 2022 | 2 | |
| Mata, Mike | Mike Mata | Director | 2006 | 1 | |
| Mata, Olga | Olga Mata | Actor | 2004 | 2 | |
| Matache, Ica | Ica Matache | Actor | 1957 - 1975 | 2 | |
| Matak, Josef | Josef Matak | Actor | 1960 | 1 | |
| Matalon, Muriel | Muriel Matalon | Actor | 1990 | 1 | |
| Matalon, Vivian | Vivian Matalon | Director | 1978 | 1 | 1 |
| Matalová, Eva | Eva Matalová | Actor | 1969 | 1 | |
| Matamoros, Diego | Diego Matamoros | Actor | 2005 - 2024 | 4 | 1 |
| Matány, Antal | Antal Matány | Actor | 1939 | 1 | |
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