| Ohrnberger, Jörg | Jörg Ohrnberger | Actor | 2010 | 6 | |
| Ollinger, Eduard | Eduard Ollinger | Lighting Designer | 2010 - 2012 | 5 | |
| Oe, Yoshihiko | Yoshihiko Oe | Dramaturg | 2010 | 16 | |
| Ozora, Mayumi | Mayumi Ozora | Actor | 2010 | 16 | |
| O'Connor, Myles | Myles O'Connor | Actor | 2010 | 1 | |
| Olson, Karin | Karin Olson | Lighting Designer | 2010 | 1 | |
| Olpin, Jay | Jay Olpin | Actor | 2010 | 1 | |
| Onishi, Akane | Akane Onishi | Actor | 2010 | 1 | |
| Osten, Emil von | Emil von Osten | Actor | 1890 | 1 | |
| Ostanek, Kristijan | Kristijan Ostanek | Actor | 2009 | 6 | |
| Okafor, Stella | Stella Okafor | Lighting Designer | 2009 | 1 | |
| Ozkaya, Zeynep | Zeynep Ozkaya | Actor | 2010 | 1 | |
| Ouchi, Satomi | Satomi Ouchi | Actor | 2010 | 1 | |
| Odekirk, Alexandria | Alexandria Odekirk | Actor | 2010 | 1 | |
| Ochsenbauer, Georg | Georg Ochsenbauer | Lighting Designer, Sound Designer | 2016 | 2 | |
| Ozawa, Maju | Maju Ozawa | Actor | 2009 | 1 | |
| Ono, Tetsushi | Tetsushi Ono | Actor | 2009 | 1 | |
| Okada, Yu | Yu Okada | Sound Designer | 2009 | 1 | |
| Oshima, Akiko | Akiko Oshima | Dramaturg | 2009 | 1 | |
| Oliel, Zuzu | Zuzu Oliel | Actor | 2009 | 1 | |
| Ott, Katja | Katja Ott | Director | 2010 | 1 | |
| Obregon, Gustavo | Gustavo Obregon | Actor | 2009 | 9 | |
| Oja, Andres | Andres Oja | Actor | 2001 - 2010 | 2 | |
| O'Connell, Steve | Steve O'Connell | Actor | 2010 | 1 | |
| Ono, Hacchaku | Hacchaku Ono | Dramaturg | 2009 | 3 | |
| Oseng, Ellen | Ellen Oseng | Costume Designer, Designer | 2009 | 2 | |
| Oak, Girija | Girija Oak | Translator | 2009 | 1 | |
| Ohinmaa, Hertta-Maija | Hertta-Maija Ohinmaa | Actor | 2009 | 2 | |
| O'Brien, Keith | Keith O'Brien | Musical Director | 2016 - 2019 | 2 | |
| Oblokar, Samo | Samo Oblokar | Lighting Designer | 2010 - 2012 | 3 | |
| Omori, Naomi | Naomi Omori | Actor | 2010 | 1 | |
| O’Neill, Michael | Michael O’Neill | Director | 2010 | 1 | |
| Orillac, Sebastian | Sebastian Orillac | Actor | 2010 | 1 | |
| O’Brien, Brad | Brad O’Brien | Actor | 2010 | 1 | |
| Orth, Walther | Walther Orth | Actor | 1964 | 1 | |
| Odqvist, Svante | Svante Odqvist | Actor | 1964 | 1 | |
| O'Keefe, Nina | Nina O'Keefe | Actor | 2011 | 1 | |
| Osburn, Nathan | Nathan Osburn | Actor | 2011 | 2 | |
| O’Hearn, Nigel | Nigel O’Hearn | Adaptation | 2011 - 2016 | 4 | |
| Odanović, Olga | Olga Odanović | Actor | 2011 | 1 | |
| Omundi, Geoffrey | Geoffrey Omundi | Actor | 2011 | 1 | |
| Opilik, Klaus | Klaus Opilik | Director | 2011 | 1 | |
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