| Mihăilescu, Ion | Ion Mihăilescu | Director | 1956 - 1980 | 2 | |
| Marcel, Robert | Robert Marcel | Actor | 1956 - 1972 | 5 | |
| Masserano Taricco, Pietro | Pietro Masserano Taricco | Director | 1956 - 1962 | 2 | |
| Montemurri, Davide | Davide Montemurri | Actor | 1956 - 1961 | 2 | |
| Micheel, Gerd | Gerd Micheel | Actor | 1956 - 1958 | 2 | |
| Mellies, Wolfgang | Wolfgang Mellies | Actor | 1956 - 1958 | 2 | |
| Mellies, Eberhard | Eberhard Mellies | Director | 1956 - 1958 | 2 | |
| Mauss, Brigitte | Brigitte Mauss | Costume Designer | 1956 - 1958 | 2 | |
| Masson, Gust | Gust Masson | Mask Maker | 1956 - 1957 | 3 | |
| Markey, Jolande | Jolande Markey | Actor | 1956 - 1957 | 6 | |
| Maeremans, G. | G. Maeremans | Actor | 1956 - 1957 | 3 | |
| Mertens, J. | J. Mertens | Actor | 1956 - 1957 | 3 | |
| Munro, Nan | Nan Munro | Actor | 1956 - 1957 | 2 | |
| Macpherson, William | William Macpherson | Designer | 1956 | 1 | |
| Malmström, Ulla | Ulla Malmström | Actor | 1956 | 1 | |
| May, Gisela | Gisela May | Actor | 1956 | 1 | |
| Merino, Juana | Juana Merino | Costume Designer | 1956 | 1 | |
| Motley, Robert | Robert Motley | Designer | 1956 | 1 | |
| Macháček, Frantisek | Frantisek Macháček | Actor | 1956 | 1 | |
| McMahon, James B. | James B. McMahon | Actor | 1956 | 1 | |
| Manon, Violeta | Violeta Manon | Actor | 1956 | 1 | |
| Mirski, Krastjo | Krastjo Mirski | Director, Translator | 1956 | 2 | |
| Mandil, Milka | Milka Mandil | Actor | 1956 | 1 | |
| Mussina, Nadezhda | Nadezhda Mussina | Actor | 1956 | 1 | |
| Martin, Walter | Walter Martin | Actor | 1956 | 1 | |
| Molitor, Marion | Marion Molitor | Actor | 1956 | 1 | |
| McCloskey, Michael | Michael McCloskey | Lighting Designer | 1956 | 1 | |
| Malone, Anne | Anne Malone | Actor | 1956 | 1 | |
| Marlowe, Margaret | Margaret Marlowe | Actor | 1956 | 1 | |
| Mahnke, Fritz | Fritz Mahnke | Designer | 1956 | 1 | |
| Moruzan, Jenny | Jenny Moruzan | Actor | 1956 | 1 | |
| Morris, Marvin | Marvin Morris | Actor | 1956 | 1 | |
| Milenkovic, Zivojin | Zivojin Milenkovic | Actor | 1956 | 1 | |
| Marinovic, Aleksandar | Aleksandar Marinovic | Actor | 1956 | 1 | |
| Milanovic, Branislav | Branislav Milanovic | Actor | 1956 | 1 | |
| McKinney, George | George McKinney | Designer | 1956 | 1 | |
| Mauksch, Irmgard | Irmgard Mauksch | Actor | 1956 | 1 | |
| Mogyorossi, Győző | Győző Mogyorossi | Actor | 1956 | 1 | |
| Moreno, Ricardo | Ricardo Moreno | Designer, Lighting Designer | 1956 | 2 | 1 |
| Marinkovic, Rados | Rados Marinkovic | Costume Designer | 1956 | 1 | 1 |
| Molina, Los Gemelos | Los Gemelos Molina | Actor | 1956 | 1 | |
| Mora, Juan | Juan Mora | Actor | 1956 | 1 | |
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