| Ohloff, Hans | Hans Ohloff | Actor | 1939 | 1 | |
| Orr, Connie | Connie Orr | Actor | 1965 | 1 | |
| O'Dowd, Spencer | Spencer O'Dowd | Actor | 2008 | 2 | |
| Okubo, Ryoichi | Ryoichi Okubo | Actor | 2008 | 1 | |
| Olt, Edgar | Edgar Olt | Actor | 1955 | 3 | |
| Otenbacher, Margot | Margot Otenbacher | Actor | 1959 | 1 | |
| Ostendorf, Josef | Josef Ostendorf | Actor | 1991 - 2016 | 8 | |
| Orlac, Stephan | Stephan Orlac | Actor | 1966 | 2 | |
| Olsen, Tim | Tim Olsen | Actor | 2009 | 1 | |
| Ohkuwa, Akane | Akane Ohkuwa | Actor | 2009 | 1 | |
| O'Neill, Vincent | Vincent O'Neill | Actor | 2009 | 1 | |
| Otto, Frank-Tilmann | Frank-Tilmann Otto | Costume Designer, Designer | 2008 | 4 | |
| Okukawa, Koji | Koji Okukawa | Actor | 2008 - 2010 | 5 | |
| Otterson, William | William Otterson | Actor | 2009 | 1 | |
| Otto, Max Julian | Max Julian Otto | Designer | 2008 - 2009 | 4 | |
| O'Reilly, Ciarán | Ciarán O'Reilly | Director | 2008 | 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 | |
| Ohkawa, Minako | Minako Ohkawa | Actor | 2008 - 2009 | 6 | |
| Ono, Y. | Y. Ono | Dramaturg | 2008 - 2009 | 3 | |
| Ortiz, Joanna | Joanna Ortiz | Actor | 2008 | 1 | |
| Ott, Karl | Karl Ott | Actor | 1880 - 1893 | 3 | |
| Ott, Gisela | Gisela Ott | Actor | 1889 | 1 | |
| 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 | |
| Ofsdal, Steinar | Steinar Ofsdal | Musician | 1978 | 38 | |
| 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 | |
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