| Mäkinen, Pauli | Pauli Mäkinen | Actor | 1980 | 4 | |
| Michel, Penny Sibylle | Penny Sibylle Michel | Actor | 1996 – 2001 | 4 | |
| Maiwald, Carolin | Carolin Maiwald | Actor | 1996 | 4 | |
| Meinberg, Lukas | Lukas Meinberg | Actor | 1995 | 4 | |
| Müller-Beck, Klaus | Klaus Müller-Beck | Actor | 2002 – 2007 | 4 | 1 |
| Morgan, Roger | Roger Morgan | Lighting Designer | 1968 – 1998 | 4 | |
| Mertens, Christine | Christine Mertens | Actor | 2014 | 4 | 4 |
| Mawby, Michael | Michael Mawby | Actor | 1997 – 1998 | 4 | |
| Matthews, Seymour | Seymour Matthews | Actor | 1997 – 1998 | 4 | |
| Manning, Guy | Guy Manning | Actor | 1997 – 1998 | 4 | |
| Martino, Federica Di | Federica Di Martino | Actor | 2013 – 2014 | 4 | |
| Macaluso, Andrea | Andrea Macaluso | Actor | 2013 – 2014 | 4 | |
| Mandolini, Mauro | Mauro Mandolini | Actor | 2013 – 2014 | 4 | |
| Martin, John | John Martin | Actor | 1969 | 4 | |
| Miklós, Marcell | Marcell Miklós | Actor | 1924 | 4 | |
| Miller, Betty | Betty Miller | Actor | 1947 – 1967 | 4 | |
| Mallard, Jonathan | Jonathan Mallard | Actor | 1967 | 4 | |
| Mészáros, Béla | Béla Mészáros | Actor | 1937 | 4 | |
| Moore, William, A. | William A. Moore | Actor | 1948 – 1966 | 4 | |
| Meinecke, Otto Hans | Otto Hans Meinecke | Actor | 1966 | 4 | |
| Musser, Tharon | Tharon M. Musser | Lighting Designer | 1949 – 1965 | 4 | |
| Müller, Erwin | Erwin Müller | Actor | 1901 – 1909 | 4 | |
| Milianti, Alain | Alain Milianti | Director | 2002 | 4 | |
| Momtsou, Eleni | Eleni Momtsou | Actor | 2002 – 2003 | 4 | |
| Mihičić, Milica | Milica Mihičić | Actor | 1891 – 1897 | 4 | |
| Murray, Tim | Tim Murray | Actor | 1989 | 4 | |
| Mazzarelli, Victoria | Victoria Mazzarelli | Actor | 2003 | 4 | |
| Menzel, Jochen | Jochen Menzel | Actor | 1997 | 4 | |
| Meriwether, Liz | Elizabeth Meriwether | Actor, Adaptation | 2003 – 2011 | 4 | |
| Melis, Gábor | Gábor Melis | Actor | 1976 | 4 | |
| Mendès, Natacha | Natacha Mendès | Actor | 2003 – 2004 | 4 | |
| Manners, Katherine | Katherine Manners | Actor | 2003 | 4 | |
| Magnusson , Douglas | Douglas Magnusson | Actor | 2003 | 4 | |
| Meyer, Sibylle | Sibylle Meyer | Costume Designer, Designer | 2003 – 2004 | 4 | |
| Mecerodová, Ludmila | Ludmila Mecerodová | Actor | 2008 – 2009 | 4 | |
| Menéndez, Fabio | Fabio Menéndez | Actor | 2001 | 4 | |
| Maratrat, Alain | Alain Maratrat | Adaptation, Director | 2004 | 4 | |
| Maléř, Jan | Jan Maléř | Actor | 2005 – 2007 | 4 | 2 |
| Mentz, Heide | Heide Mentz | Actor | 1976 | 4 | |
| Manu, Imelda | Imelda Manu | Designer | 2005 – 2006 | 4 | |
| Mikkola, Katriina | Katriina Mikkola | Actor | 2005 | 4 | |
| Mosorescu , George | George Mosorescu | Costume Designer, Designer | 2010 | 4 | |
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