| Müller, Ulrich K. | Ulrich K. Müller | Actor | 2011 - 2015 | 2 | |
| Malone, Rick | Rick Malone | Sound Designer | 2011 - 2017 | 2 | |
| Martin, Sebastian | Sebastian Martin | Actor | 2011 | 2 | |
| Marti, Lorenz | Lorenz Marti | Actor | 2012 | 2 | |
| Mattin, Mimi | Mimi Mattin | Costume Designer | 1960 - 1964 | 2 | |
| Margulies, Armand | Armand Margulies | Actor | 1964 - 1970 | 2 | |
| Mugur, Vlad | Vlad Mugur | Director | 1964 - 1965 | 2 | |
| Mottoi, George | George Mottoi | Actor | 1964 - 1965 | 2 | |
| Moore, Shanae’a | Shanae’a Moore | Actor | 2016 - 2020 | 2 | |
| McMorrough, Jeff | Jeff McMorrough | Actor | 2016 - 2020 | 2 | |
| McCormick, Carolyn | Carolyn McCormick | Actor | 1999 - 2016 | 2 | |
| Melhardt, Edgar | Edgar Melhardt | Actor | 1962 - 1963 | 2 | |
| Merton, Atle | Atle Merton | Actor | 1962 - 1963 | 2 | |
| Mlalazi, Christopher | Christopher Mlalazi | Adaptation | 2015 - 2016 | 2 | |
| Mupondirio, Cornelius | Cornelius Mupondirio | Musician | 2015 - 2016 | 2 | |
| Mutore, Tichaona | Tichaona Mutore | Actor | 2015 - 2016 | 2 | |
| Milhofer, Mark | Mark Milhofer | Actor | 2012 | 2 | |
| Morrison, David | David Morrison | Actor | 2012 | 2 | |
| Maronek, James | James Maronek | Costume Designer, Designer | 1952 - 1962 | 2 | |
| Marinos, Iordanis | Iordanis Marinos | Actor | 1945 - 1962 | 2 | |
| Marazek, Otto | Otto Marazek | Actor | 1962 | 2 | |
| McBride, Vaughn | Vaughn McBride | Actor | 1962 - 1963 | 2 | |
| Machens, Franziska | Franziska Machens | Actor | 2012 - 2014 | 2 | |
| Miller, Mary | Mary Miller | Actor | 1962 | 2 | |
| Mowlam, Carole | Carole Mowlam | Actor | 1962 | 2 | |
| Menskau, Frank | Frank Menskau | Lighting Designer | 1961 - 1962 | 2 | |
| Mercedes, Nita | Nita Mercedes | Actor | 1961 | 2 | |
| Miles, Bernard | Bernard Miles | Actor, Designer | 1933 - 1961 | 2 | |
| Morris, Anthea | Anthea Morris | Actor | 1961 | 2 | |
| Meyer, Hanna | Hanna Meyer | Actor | 1954 - 1961 | 2 | |
| McGuire, Michael | Michael McGuire | Actor | 1961 - 1962 | 2 | |
| McBride, Betsy | Betsy McBride | Actor | 2012 | 2 | |
| Mroch, Mike | Mike Mroch | Designer | 2011 - 2014 | 2 | |
| Messner, Franz | Franz Messner | Actor | 1960 | 2 | |
| McDermott, Gerard | Gerard McDermott | Actor | 2011 | 2 | |
| Mayanglambam, Mangka | Mangka Mayanglambam | Actor | 2012 | 2 | |
| Marcopol, Athena | Athena Marcopol | Actor | 1944 - 1945 | 2 | |
| Mălureanu, Florica | Florica Mălureanu | Costume Designer, Designer | 1976 | 2 | |
| Micalgic, Goran | Goran Micalgic | Actor | 2012 | 2 | |
| Mahoney, Caitlin | Caitlin Mahoney | Actor | 2011 - 2013 | 2 | |
| Mascaro, Marcel | Marcel Mascaro | Actor | 2011 - 2013 | 2 | |
| Mänttäri, Jyrki | Jyrki Mänttäri | Actor | 2011 - 2012 | 2 | |
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