| Oliver, Barbara | Barbara Oliver | Actor, Director | 2006 - 2010 | 3 | 1 |
| Oliver, Anna | Anna Oliver | Costume Designer | 1999 - 2010 | 3 | |
| Oliveira, Vidal de | Vidal de Oliveira | Translator | 1949 - 1994 | 6 | |
| Oliveira, María Clara | María Clara Oliveira | Actor | 2024 | 1 | |
| Oliveira, Joice | Joice Oliveira | Actor | 1945 | 1 | |
| Oliveira, João, Ricardo Barros | João Ricardo Barros Oliveira | Musical Director, Sound Designer | 2002 - 2021 | 4 | |
| Oliveira, Inês da Cruz | Inês da Cruz Oliveira | Actor | 2023 | 1 | |
| Oliveira, Domingos, José Soares de | Domingos José Soares de Oliveira | Actor, Adaptation, Director, Lighting Designer, Sound Designer, Translator | 1983 - 1998 | 15 | |
| Oliveira, Christian Manuel | Christian Manuel Oliveira | Actor | 2006 - 2007 | 4 | |
| Olive, Edyth | Edyth Olive | Actor | 1906 | 1 | 1 |
| Olivari, Michela | Michela Olivari | Actor | 2018 | 1 | |
| Olivares, Erica | Erica Olivares | Actor | 1976 | 1 | |
| Olivar, Mr | Mr Olivar | Actor | 1900 | 2 | |
| Olivar, César | César Olivar | Costume Designer | 2004 | 1 | 1 |
| Oliva, Petr | Petr Oliva | Actor | 1972 | 1 | |
| Oliva, Mr. | Mr. Oliva | Actor | 1893 | 1 | |
| Olisah, Paul | Paul Olisah | Actor, Designer | 2002 | 2 | |
| Olinger, Thomas | Thomas Olinger | Actor | 1934 | 1 | |
| Olinger, T. Lawrence | T. Lawrence Olinger | Actor | 1932 | 1 | |
| Olinger, Marc | Marc Olinger | Actor | 2003 | 2 | |
| Olinescu, Boris | Boris Olinescu | Actor, Assistant Director | 1959 | 2 | |
| Olin, Vilhelm | Vilhelm Olin | Actor, Director | 1886 - 1919 | 4 | 1 |
| Olin, Kerstin | Kerstin Olin | Actor | 1953 | 2 | |
| Olin, Brita | Brita Olin | Actor | 1936 | 1 | |
| Olin, Anna | Anna Olin | Actor | 1919 | 1 | |
| Olijnyk, Jiří | Jiří Olijnyk | Actor | 1969 | 1 | |
| Oligny, Huguette | Huguette Oligny | Actor | 1996 | 1 | 1 |
| Oligmüller, Kurt | Kurt Oligmüller | Actor | 1961 | 1 | |
| Olier, Luz | Luz Olier | Actor | 2016 | 8 | |
| Oliel, Zuzu | Zuzu Oliel | Actor | 2009 | 1 | |
| Olich, Michael | Michael Olich | Costume Designer | 1992 | 1 | |
| Oliai, Alireza | Alireza Oliai | | | | |
| Oľha, Matúš | Matúš Oľha | Director | 1993 | 1 | |
| Olgyai, Magda | Magda Olgyai | Actor | 1983 | 1 | |
| Olesen, Ninna | Ninna Olesen | Costume Designer | 2008 | 1 | |
| Olesen, Maggie | Maggie Olesen | Actor | 1971 | 1 | |
| Olesen, Kirsten | Kirsten Olesen | Actor | 1978 - 2011 | 12 | 2 |
| Olesen, Henning | Henning Olesen | Actor | 1983 - 2010 | 3 | 1 |
| Oleś, Marcin | Marcin Oleś | Composer | 2006 - 2009 | 7 | |
| Oleś, Bartłomiej Brat | Bartłomiej Brat Oleś | Composer | 2006 - 2009 | 7 | |
| Olerud, Ingeborg S. | Ingeborg S. Olerud | Lighting Designer | 2008 - 2010 | 4 | |
| Olenina, E. | E. Olenina | Dancer | 1999 - 2000 | 2 | |
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