| Oze, Toshiko | Toshiko Oze (Toshiko Oze) | Actor | 1968 | 1 | |
| Orzechowska, Jolanta | Jolanta Orzechowska (Jolanta Orzechowska) | Actor | 1983 | 1 | |
| Osterwianka, Elżbieta | Elżbieta Osterwianka (Elżbieta Osterwianka) | Actor | 1973 | 1 | |
| Otto, Wilhelm | Wilhelm Otto | Actor | 1889 - 1898 | 5 | |
| Orlandini, C. | C. Orlandini (C. Orlandini) | Actor | 1891 - 1892 | 3 | |
| Oenicke, Christa | Christa Oenicke (Christa Oenicke) | Actor | 1958 | 1 | |
| Okada, Inosuke | Inosuke Okada (Inosuke Okada) | Lighting Designer | 1934 | 1 | |
| Ogawa, Noboru | Noboru Ogawa (Noboru Ogawa) | Lighting Designer | 1946 | 1 | |
| Oleś, Bartłomiej Brat | Bartłomiej Brat Oleś (Bartłomiej Brat Oleś) | Composer | 2006 - 2009 | 7 | |
| Oscar, - | - Oscar (- Oscar) | Choreographer | 2006 | 1 | |
| O'Donnell, Beatrice | Beatrice O'Donnell (Beatrice O'Donnell) | Actor | 1981 | 1 | |
| Orlova, Lubov | Lubov Orlova (Lubov Orlova) | Actor | 1959 | 1 | |
| Olenin, B. | B. Olenin (B. Olenin) | Actor | 1959 | 1 | |
| O'Brien, Jaye | Jaye O'Brien (Jaye O'Brien) | Actor | 1957 | 1 | |
| Oest, Johann Adam | Johann Adam Oest (Johann Adam Oest) | Actor | 1977 - 2004 | 4 | |
| Oppenheim, Yoni | Yoni Oppenheim (Yoni Oppenheim) | Director, Producer | 2011 | 2 | |
| Otupacca, Alessandro | Alessandro Otupacca (Alessandro Otupacca) | Actor | 2011 | 1 | |
| Orlandini, Claudio | Claudio Orlandini (Claudio Orlandini) | Director | 2011 | 1 | |
| Osbourne, Lynne | Lynne Osbourne (Lynne Osbourne) | Actor | 2000 | 1 | |
| Otto-Körner, Margarethe | Margarethe Otto-Körner (Margarethe Otto-Körner) | Actor | 1898 - 1929 | 13 | |
| Oskui, Mahin | Mahin Oskui (Mahin Oskui) | Actor, Director | 1959 | 2 | |
| Otto | Otto - (Otto -) | Composer | 2002 | 1 | |
| Orneallas, David | David Orneallas (David Orneallas) | Actor | 2011 | 1 | |
| Odilon, Helene | Helene Odilon (Helene Odilon) | Actor | 1894 | 1 | |
| Odendahl-James, Jules | Jules Odendahl-James (Jules Odendahl-James) | Dramaturg | 2011 | 1 | |
| Owen, Sally | Sally Owen (Sally Owen) | Choreographer | 2010 | 1 | |
| Orloff, Ida | Ida Orloff (Ida Orloff) | Actor | 1905 - 1942 | 26 | |
| Otto, Erich | Erich Otto (Erich Otto) | Actor | 1920 - 1921 | 2 | |
| Ottesen, Roald | Roald Ottesen (Roald Ottesen) | Lighting Designer | 1972 | 1 | |
| Ofori-Attah, Rhoda | Rhoda Ofori-Attah (Rhoda Ofori-Attah) | Actor | 2011 | 1 | |
| Ochandiano, Amelia | Amelia Ochandiano (Amelia Ochandiano) | Director | 2010 - 2011 | 40 | |
| O'Grady, Frank | Frank O'Grady (Frank O'Grady) | Actor | 1932 | 1 | |
| Oliveira, Joice | Joice Oliveira (Joice Oliveira) | Actor | 1945 | 1 | |
| O'Grady, Chris | Chris O'Grady (Chris O'Grady) | Actor | 2011 | 1 | |
| O'Grady, Sorcha | Sorcha O'Grady (Sorcha O'Grady) | Actor | 2011 | 1 | |
| O'Neill, Chris | Chris O'Neill (Chris O'Neill) | Designer, Lighting Designer | 2011 | 2 | |
| Ottenheimer, Albert M. | Albert M. Ottenheimer (Albert M. Ottenheimer) | Actor | 1932 - 1936 | 4 | |
| Oraker, Rutledge | Rutledge Oraker (Rutledge Oraker) | Actor | 1932 | 2 | |
| Opsvig, Virginia | Virginia Opsvig (Virginia Opsvig) | Costume Designer, Mask Maker | 1931 - 1936 | 4 | |
| O'Gara, Patrick | Patrick O'Gara (Patrick O'Gara) | Actor | 1973 | 1 | |
| Ogawa, Toshiro | Toshiro Ogawa (Toshiro Ogawa) | Lighting Designer | 1964 - 1981 | 2 | |
| O'Leary, Bridget Kathleen | Bridget Kathleen O'Leary (Bridget Kathleen O'Leary) | Director | 2011 | 1 | |
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