| Maattola, Inke | Inke Maattola | Actor | 1964 - 1969 | 2 | |
| Montoya, Maria, Teresa | Maria Teresa Montoya | Actor | 1969 | 1 | |
| Miranda, Luis | Luis Miranda | Actor | 1969 | 1 | |
| Miletineanu, Gheorghe | Gheorghe Miletineanu | Director | 1969 - 1978 | 2 | |
| Milne, Ian | Ian Milne | Actor | 1969 | 1 | |
| McMaster, Jim | Jim McMaster | Actor | 1969 | 1 | |
| McCaig, Ian | Ian McCaig | Actor | 1969 | 1 | |
| Mancebo, Nelson | Nelson Mancebo | Costume Designer, Designer | 1976 - 2001 | 6 | |
| Mikulíková, Michaela | Michaela Mikulíková | Actor | 1997 | 2 | |
| Mikkonen, Susanna | Susanna Mikkonen | Actor | 1997 | 2 | |
| Miklós, Marcell | Marcell Miklós | Actor | 1924 - 1925 | 4 | |
| Mayr, Paul | Paul Mayr | Actor | 1997 | 1 | |
| Mitterrutzner, Peter | Peter Mitterrutzner | Adaptation, Director | 1997 | 2 | |
| Mühlsteiger, Alexander | Alexander Mühlsteiger | Composer | 1997 | 1 | |
| Mayr, Adele | Adele Mayr | Actor | 1997 | 1 | |
| Mann, Winifred | Winifred Mann | Actor | 1971 | 1 | |
| Milde, Ewa | Ewa Milde | Actor | 1968 | 1 | |
| McGrath, Carrie | Carrie McGrath | Costume Designer | 1968 | 1 | |
| Meyer, Martin | Martin Meyer | Adaptation | 1968 | 1 | |
| McCullough, Patrick | Patrick McCullough | Actor | 1968 | 1 | |
| Magill, John | John Magill | Actor | 1968 | 1 | |
| Mann, Joanna | Joanna Mann | Actor | 1968 | 1 | |
| Müller, Gotthard | Gotthard Müller | Director | 1968 | 1 | |
| Martin, Walter | Walter Martin | Actor | 1968 | 1 | |
| Marcos, David | David Marcos | Actor | 1971 | 1 | |
| McDaniel, Scott | Scott McDaniel | Actor | 1971 | 1 | |
| McDoniel, Nancy | Nancy McDoniel | Actor | 1971 | 1 | |
| Myrvold, Paul | Paul Myrvold | Actor | 1971 | 1 | |
| Mitchell, Betty | Betty Mitchell | Director | 1968 | 1 | |
| McCullagh, Jack | Jack McCullagh | Designer | 1968 | 1 | |
| Mosch, Rita | Rita Mosch | Actor | 1968 - 2003 | 3 | |
| Monnard, Phoebe | Phoebe Monnard | Actor | 1968 | 1 | |
| Meyer, Klaus | Klaus Meyer | Choreographer | 1968 | 1 | |
| Mantel, Maria | Maria Mantel | Actor | 1968 | 1 | |
| Morrill, Dexter | Dexter Morrill | Composer | 1968 | 1 | |
| Munson, Jim | Jim Munson | Actor | 1968 | 1 | |
| Maines, Claudia | Claudia Maines | Actor | 1968 | 2 | |
| Mester, Tibor | Tibor Mester | Actor | 1933 - 1941 | 6 | |
| Mátrai, Erzsi, T. | Erzsi T. Mátrai | Actor | 1931 - 1935 | 2 | |
| Mayberry, Wayne | Wayne Mayberry | Actor | 2008 | 1 | |
| Minks, Wilfried | Wilfried Minks | Costume Designer, Designer | 1968 | 2 | |
| Matthé, Friedrich | Friedrich Matthé | Actor | 1968 | 1 | |
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