| McLain, Heath | Heath McLain | Designer | 2008 | 1 | |
| Merritt, Clint | Clint Merritt | Actor | 2008 | 1 | |
| Merritt, Noah | Noah Merritt | Actor | 2008 | 1 | |
| Maglajlić, Lada | Lada Maglajlić | Designer | 2009 | 4 | |
| Miter, Delores | Delores Miter | Actor | 1950 | 1 | |
| Mathew, Erik | Erik Mathew | Actor | 2009 | 1 | |
| Makri, Maria | Maria Makri | Actor | 2009 - 2010 | 3 | |
| Manson Jones, Rebecca | Rebecca Manson Jones | Adaptation, Director | 2009 - 2013 | 15 | |
| Mascall, Tim | Tim Mascall | Lighting Designer | 2009 | 2 | |
| Mazzinghi, Bernard | Bernard Mazzinghi | Actor | 2009 - 2010 | 3 | |
| Mae: "Storm", Vanessa | Vanessa Mae: "Storm" | Composer | 2009 | 33 | |
| Mellerup, Oscar, Hatting | Oscar Hatting Mellerup | Actor | 2009 | 33 | |
| Melles, Judith | Judith Melles | Actor | 1976 - 1994 | 2 | |
| Morris, Shona | Shona Morris | Actor | 1972 | 1 | |
| Mason, Bim | Bim Mason | Actor | 1972 | 1 | |
| Money-Coutts, Clare | Clare Money-Coutts | Actor | 1972 | 1 | |
| Maxim, Cosmin | Cosmin Maxim | Actor | 2014 - 2018 | 6 | |
| Moget, Marc | Marc Moget | Lighting Designer | 1983 | 1 | |
| Mellier, Daniel | Daniel Mellier | Actor | 1983 | 1 | |
| Moore, Christopher | Christopher Moore | Actor, Sound Designer | 1983 - 1999 | 2 | |
| Matthews, Dakin | Dakin Matthews | Actor | 1983 - 1986 | 2 | |
| Morteveille , Waltraud | Waltraud Morteveille | Actor | 1978 | 1 | |
| Mercier, Annie | Annie Mercier | Actor | 2009 - 2010 | 6 | |
| Maghdoodieh, Hadi | Hadi Maghdoodieh | Actor | 2009 | 1 | |
| Mo'alemi, Maryam | Maryam Mo'alemi | Actor | 2009 | 1 | |
| Mortimer, Kristina | Kristina Mortimer | Actor | 2010 | 1 | |
| Merdani, Alban | Alban Merdani | Actor | 2010 | 1 | |
| Matteis, Maurizio de | Maurizio de Matteis | Actor | 1976 | 1 | |
| Möller, Gunnar | Gunnar Möller | Actor | 1983 | 1 | |
| Minor, Philip | Philip Minor | Actor | 1983 | 1 | |
| Mustoff, Sonja | Sonja Mustoff | Actor | 1971 - 2013 | 10 | |
| Macko, Peter | Peter Macko | Actor | 1983 | 1 | |
| Mortensen, Ib | Ib Mortensen | Lighting Designer | 1983 | 1 | |
| Munk, Troels | Troels Munk | Actor | 1950 - 2003 | 7 | |
| Masters, Andrea | Andrea Masters | Actor | 1984 | 1 | |
| McCaffrey, Robin | Robin McCaffrey | Actor | 1984 | 1 | |
| Munrow, Julia | Julia Munrow | Actor | 1984 | 1 | |
| Mavromati, Eleni | Eleni Mavromati | Actor | 1984 | 1 | |
| Mokas, Lefteris | Lefteris Mokas | Actor | 1984 | 1 | |
| Martinelli, Jean-Louis | Jean-Louis Martinelli | Director, Translator | 2010 - 2012 | 6 | |
| Morvan, Tifenn | Tifenn Morvan | Costume Designer | 2010 - 2012 | 3 | |
| Miller, Missy | Missy Miller | Actor | 2010 | 1 | |
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