| Masulli, Alberto | Alberto Masulli | Choreographer | 1968 | 1 | |
| Masud, - | - Masud | Actor | 2006 | 1 | |
| Masuch, Sarah | Sarah Masuch | Actor | 2001 - 2004 | 4 | 1 |
| Masuch, Bettina | Bettina Masuch | Actor | 1985 | 1 | |
| Mastrosavas, Max | Max Mastrosavas | Actor | 1986 | 1 | |
| Mastropasqua, Sergio | Sergio Mastropasqua | Actor | 2022 - 2024 | 7 | |
| Mastromonaco, Bianca | Bianca Mastromonaco | Actor | 2022 | 2 | |
| Mastroianni, Stefania | Stefania Mastroianni | Actor | 2024 | 1 | |
| Mastroianni, Marcello | Marcello Mastroianni | Actor | 1972 - 1973 | 4 | |
| Mastrantonio, Mary Elizabeth | Mary Elizabeth Mastrantonio | Actor | 2022 | 1 | |
| Mastrantoni, Augusto | Augusto Mastrantoni | Actor | 1954 | 1 | |
| 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 | |
| Mast, Holden | Holden Mast | Actor | 2022 | 1 | |
| Massute, Hendrik | Hendrik Massute | Actor | 2000 | 1 | 1 |
| Maßun, Monika | Monika Maßun | Actor | 1995 | 2 | |
| 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, Simon | Simon Masson | Sound Designer | 2023 - 2025 | 41 | |
| 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 | |
| Massman, Denise | Denise Massman | Costume Designer | | 1 | |
| Massip, María | María Massip | Actor | 1966 | 1 | |
| Massini, Fabrizio | Fabrizio Massini | Producer | 2014 - 2019 | 9 | |
| Massingham, Dorothy | Dorothy Massingham | Actor | 1918 | 1 | |
| Massingham, Andy | Andy Massingham | Actor | 2009 | 1 | 1 |
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