| Olsen, Tim | Tim Olsen | Actor | 2009 | 1 | |
| Ohkuwa, Akane | Akane Ohkuwa | Actor | 2009 | 1 | |
| O'Neill, Vincent | Vincent O'Neill | Actor | 2009 | 1 | |
| Otterson, William | William Otterson | Actor | 2009 | 1 | 1 |
| Onegin, Andrei | Andrei Onegin | Designer | 2009 | 1 | |
| Olsen, Leif | Leif Olsen | Composer | 2009 | 1 | |
| Ogden, James | James Ogden | Designer | 2009 | 1 | |
| Oakes, Robert | Robert Oakes | Adaptation | 2009 | 1 | |
| Ostanek, Kristijan | Kristijan Ostanek | Actor | 2009 | 6 | |
| Okafor, Stella | Stella Okafor | Lighting Designer | 2009 | 1 | |
| 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 | |
| Obregon, Gustavo | Gustavo Obregon | Actor | 2009 | 9 | |
| 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 | |
| Overå, Astrid | Astrid Overå | Actor | 2009 | 1 | |
| O'Keefe, Nathan | Nathan O'Keefe | Actor | 2008 - 2017 | 3 | |
| Ostendorf, Nils | Nils Ostendorf | Composer | 2008 - 2014 | 54 | 1 |
| Olivetti, Alessia | Alessia Olivetti | Actor | 2008 - 2011 | 4 | |
| Orlova, Elena, Ju. | Elena Ju. Orlova | Costume Designer | 2008 - 2011 | 2 | |
| Omar, Sulekha Ali | Sulekha Ali Omar | Choreographer, Dancer | 2008 - 2010 | 4 | |
| Olerud, Ingeborg S. | Ingeborg S. Olerud | Lighting Designer | 2008 - 2010 | 4 | |
| Okukawa, Koji | Koji Okukawa | Actor | 2008 - 2010 | 5 | |
| Otto, Max Julian | Max Julian Otto | Designer | 2008 - 2009 | 4 | |
| Ohkawa, Minako | Minako Ohkawa | Actor | 2008 - 2009 | 6 | |
| Ono, Y. | Y. Ono | Dramaturg | 2008 - 2009 | 3 | |
| O'Brien, Dan | Dan O'Brien | Designer, Lighting Designer | 2008 | 2 | |
| Olsson, Tove | Tove Olsson | Actor | 2008 | 10 | 3 |
| Ogawa, Ikuo | Ikuo Ogawa | Lighting Designer | 2008 | 1 | |
| Oakenleaf, Fingal | Fingal Oakenleaf | Actor | 2008 | 1 | |
| Oaten, James | James Oaten | Actor | 2008 | 1 | |
| Orbán, Attila | Attila Orbán | Actor | 2008 | 5 | |
| O'Neill, Michelle | Michelle O'Neill | Actor | 2008 | 3 | |
| Ozoliņš, Aigars | Aigars Ozoliņš | Designer | 2008 | 1 | |
| O'Brien, Barret | Barret O'Brien | Actor | 2008 | 1 | |
| Oja, Totti | Totti Oja | Actor | 2008 | 1 | |
| Ortolani, Philip | Philip Ortolani | Actor | 2008 | 1 | |
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