| Orwoll, Styrk | Styrk Orwoll | Actor | 1948 | 1 | |
| Ohlin, Nils | Nils Ohlin | Actor | 1948 | 1 | |
| O'Reilly, Alpho | Alpho O'Reilly | Actor | 1948 | 1 | |
| Orfanidis, Stelios | Stelios Orfanidis | Designer | 1949 | 1 | |
| Oglesby, Ethel | Ethel Oglesby | Actor | 1949 | 1 | |
| O'Sullivan, Eugenie | Eugenie O'Sullivan | Director | 1949 | 1 | |
| O'Connor, Tim | Tim O'Connor | Actor | 1949 | 1 | |
| O'Malley, Tom | Tom O'Malley | Actor | 1949 | 4 | |
| Orlov, Aleksandr | Aleksandr Orlov | Actor | 2000 | 1 | |
| Olsen, Lisbeth-Anita, Grimsø | Lisbeth-Anita Grimsø Olsen | Dancer | 2017 | 1 | |
| Orliński, Bolesław | Bolesław Orliński | Actor | 1923 | 1 | |
| Ollila, Aune | Aune Ollila | | | | |
| Ohtaki, Hiroko | Hiroko Ohtaki | Actor | 2000 | 1 | |
| Oakley, Ann | Ann Oakley | Director | 2000 | 1 | |
| Oraloğlu, Alev | Alev Oraloğlu | Actor | 2012 | 1 | |
| Olska, Maria | Maria Olska | Actor | 1925 | 1 | |
| Ohoka, Kinji | Kinji Ohoka | Director, Translator | 1971 | 2 | |
| Orbán, Levente | Levente Orbán | Actor | 2016 | 2 | |
| Ozker, Eren | Eren Ozker | Actor | 1971 | 1 | |
| Otero, Cachi | Cachi Otero | Costume Designer | 1971 | 3 | |
| Ohlin, Bjarne | Bjarne Ohlin | Actor | 1971 | 4 | |
| Ognyanova, Rositsa | Rositsa Ognyanova | Actor | 2015 - 2016 | 2 | |
| O'Hara, Lesley | Lesley O'Hara | Actor | 1972 | 1 | |
| Oroșanu, Cristian | Cristian Oroșanu | Conductor | 2012 | 1 | |
| Owen, George | George Owen | Actor | 1911 - 1912 | 5 | |
| Olariu, Stelian | Stelian Olariu | Conductor | 2007 | 1 | |
| Olson, Marlo | Marlo Olson | Actor | 2017 | 1 | |
| Otto, Matt | Matt Otto | Sound Designer | 2017 | 1 | |
| Oatley, Carl | Carl Oatley | Actor | 1975 | 1 | |
| Orhon, Coşkun | Coşkun Orhon | Actor | 1965 - 1971 | 2 | |
| Oktav, Burcu | Burcu Oktav | Actor | 2017 | 1 | |
| Owens, Andrew | Andrew Owens | Actor | 2017 | 1 | |
| Ona, Bjørn | Bjørn Ona | Actor | 1985 | 1 | |
| O'Brien, Terence | Terence O'Brien | Actor | 1917 | 1 | |
| Olsen, Eyvind | Eyvind Olsen | Musician | 1976 | 1 | |
| Ohtsuka, Michiko | Michiko Ohtsuka | Actor | 1978 | 1 | |
| Obino, Kinji | Kinji Obino | Actor | 1978 | 1 | |
| Obino, Tetsushi | Tetsushi Obino | Actor | 1978 | 1 | |
| Ohtori, Yachiyo | Yachiyo Ohtori | Actor | 1978 | 1 | |
| Olson, Niclas | Niclas Olson | Actor, Adaptation, Director | 2017 | 3 | |
| Oostveen, Anne | Anne Oostveen | Actor | 1978 | 1 | |
| Olohan, John | John Olohan | Actor | 1980 | 16 | |
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