| Oosthout, Nelly | Nelly Oosthout | Actor | 1928 - 1930 | 2 | |
| O'Connell, Carol | Carol O'Connell | Actor | 1963 | 1 | |
| Opffer, Yvonne | Yvonne Opffer | Actor | 1987 | 1 | |
| Oze, Toshiko | Toshiko Oze | Actor | 1968 | 1 | |
| Orzechowska, Jolanta | Jolanta Orzechowska | Actor | 1983 | 1 | |
| Osterwianka, Elżbieta | Elżbieta Osterwianka | Actor | 1973 | 1 | |
| Otto, Wilhelm | Wilhelm Otto | Actor | 1889 - 1898 | 5 | |
| Orlandini, C. | C. Orlandini | Actor | 1891 - 1892 | 3 | |
| Oenicke, Christa | Christa Oenicke | Actor | 1958 | 1 | |
| Okada, Inosuke | Inosuke Okada | Lighting Designer | 1934 | 1 | |
| Ogawa, Noboru | Noboru Ogawa | Lighting Designer | 1946 | 1 | |
| Oleś, Bartłomiej Brat | Bartłomiej Brat Oleś | Composer | 2006 - 2009 | 7 | |
| Oscar, - | - Oscar | Choreographer | 2006 | 1 | |
| O'Donnell, Beatrice | Beatrice O'Donnell | Actor | 1981 | 1 | |
| Orlova, Lubov | Lubov Orlova | Actor | 1959 | 1 | |
| Olenin, B. | B. Olenin | Actor | 1959 | 1 | |
| O'Brien, Jaye | Jaye O'Brien | Actor | 1957 | 1 | |
| Otupacca, Alessandro | Alessandro Otupacca | Actor | 2011 | 1 | |
| Orlandini, Claudio | Claudio Orlandini | Director | 2011 | 1 | |
| Osbourne, Lynne | Lynne Osbourne | Actor | 2000 | 1 | |
| Otto-Körner, Margarethe | Margarethe Otto-Körner | Actor | 1898 - 1929 | 13 | |
| Otto | Otto - | Composer | 2002 | 1 | |
| Orneallas, David | David Orneallas | Actor | 2011 | 1 | |
| Odilon, Helene | Helene Odilon | Actor | 1894 | 1 | |
| Odendahl-James, Jules | Jules Odendahl-James | Dramaturg | 2011 | 1 | |
| Owen, Sally | Sally Owen | Choreographer | 2010 | 1 | |
| Orloff, Ida | Ida Orloff | Actor | 1905 - 1942 | 26 | |
| Otto, Erich | Erich Otto | Actor | 1920 - 1921 | 2 | |
| Ottesen, Roald | Roald Ottesen | Lighting Designer | 1972 | 1 | |
| Ofori-Attah, Rhoda | Rhoda Ofori-Attah | Actor | 2011 | 1 | |
| Ochandiano, Amelia | Amelia Ochandiano | Director | 2010 - 2011 | 40 | |
| O'Grady, Frank | Frank O'Grady | Actor | 1932 | 1 | |
| Oliveira, Joice | Joice Oliveira | Actor | 1945 | 1 | |
| O'Grady, Chris | Chris O'Grady | Actor | 2011 | 1 | |
| O'Grady, Sorcha | Sorcha O'Grady | Actor | 2011 | 1 | |
| O'Neill, Chris | Chris O'Neill | Designer, Lighting Designer | 2011 | 2 | |
| Ottenheimer, Albert M. | Albert M. Ottenheimer | Actor | 1932 - 1936 | 4 | |
| Oraker, Rutledge | Rutledge Oraker | Actor | 1932 | 2 | |
| Opsvig, Virginia | Virginia Opsvig | Costume Designer, Mask Maker | 1931 - 1936 | 4 | |
| O'Gara, Patrick | Patrick O'Gara | Actor | 1973 | 1 | |
| Ogawa, Toshiro | Toshiro Ogawa | Lighting Designer | 1964 - 1981 | 2 | |
| O'Leary, Bridget Kathleen | Bridget Kathleen O'Leary | Director | 2011 | 1 | |
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