| Masuyama, Yoshihiko | Yoshihiko Masuyama | Designer | 1967 | 1 | |
| Masuth, Matthias | Matthias Masuth | Director | 1982 | 1 | |
| Masuth, Leo | Leo Masuth | Actor | 1970 | 2 | |
| Masuth, Christian | Christian Masuth | Designer, Translator | 1990 - 2001 | 4 | |
| Masutani, Kyoko | Kyoko Masutani | Actor | 2008 | 1 | |
| Masure, Florence | Florence Masure | Actor | 2010 - 2013 | 17 | |
| Masur, Richard | Richard Masur | Actor | 1972 | 1 | |
| Masur, Ken-David | Ken-David Masur | Conductor | 2017 - 2022 | 2 | |
| Masumoto, Tatsuya | Tatsuya Masumoto | Actor | 2009 | 1 | |
| Masumoto, Kiyoshi | Kiyoshi Masumoto | Director | 1912 | 1 | |
| Masum, Farhad Uddin | Farhad Uddin Masum | Designer | 2009 | 1 | |
| Masud, - | - Masud | Actor | 2006 | 1 | |
| Masuch, Sarah | Sarah Masuch | Actor | 2001 - 2004 | 4 | |
| Masuch, Bettina | Bettina Masuch | Actor | 1985 | 1 | |
| Mastroianni, Marcello | Marcello Mastroianni | Actor | 1972 - 1973 | 4 | |
| Mastoropoulou, Agathoniki | Agathoniki Mastoropoulou | Actor | 1899 | 1 | |
| Mastoras, Michalis | Michalis Mastoras | Actor | 1939 | 2 | |
| Mastin, Dawn | Dawn Mastin | Actor | 1969 | 2 | |
| Masterson, Dorothy | Dorothy Masterson | Actor | 1954 | 1 | |
| Masterson, Carl | Carl Masterson | Actor | 2016 - 2020 | 3 | |
| Masters, Robert | Robert Masters | Actor, Designer | 1933 - 1936 | 2 | |
| Masters, Peta | Peta Masters | Actor | 1977 | 1 | |
| Masters, Andrea | Andrea Masters | Actor | 1984 | 1 | |
| Masteller, Kerry | Kerry Masteller | Actor | 2000 | 1 | |
| Mastalski, Zenon | Zenon Mastalski | Actor | 1907 - 1912 | 4 | |
| Mastalerz, Andrzej | Andrzej Mastalerz | Actor | 1998 - 2017 | 2 | |
| Massute, Hendrik | Hendrik Massute | Actor | 2000 | 1 | |
| Maßun, Monika | Monika Maßun | Actor | 1995 | 1 | |
| Massou, Khalid | Khalid Massou | Actor | 2008 | 6 | |
| Massotti, Cátia | Cátia Massotti | Actor | 2006 | 1 | |
| Masson, William C. | William C. Masson | Actor | 1926 - 1927 | 6 | |
| Masson, Louis | Louis Masson | Conductor | 1933 | 1 | |
| Masson, John | John Masson | Director | 1992 | 2 | |
| Masson, Hélène | Hélène Masson | Dancer | 1937 | 1 | |
| Masson, Gust | Gust Masson | Mask Maker | 1956 - 1957 | 3 | |
| Masson, Ernst | Ernst Masson | Designer | 1973 | 1 | |
| Masson, Daniel | Daniel Masson | Actor | 2005 | 5 | |
| Masson, Babette | Babette Masson | Actor | 1999 | 10 | |
| Masso, José Luis | José Luis Masso | Director | 2015 | 1 | |
| Massip, María | María Massip | Actor | 1966 | 1 | |
| Massini, Fabrizio | Fabrizio Massini | Producer | 2014 - 2019 | 9 | |
| Massingham, Dorothy | Dorothy Massingham | Actor | 1918 | 1 | |
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