| Obuhov, A. | A. Obuhov | | | | |
| Ondeck, Chris | Chris Ondeck | Actor | 2020 | 1 | |
| Owen-Taylor, Mark | Mark Owen-Taylor | Actor | 1983 | 1 | |
| Obrezkov, Maksim | Maksim Obrezkov | Designer | 2019 | 1 | |
| Orlenev, Pavel | Pavel Orlenev | Actor, Director | 1903 - 1923 | 7 | |
| Ostužev, Aleksandr, Alekseevic | Aleksandr Alekseevic Ostužev | Actor | 1909 | 1 | |
| Occhelli, P. | P. Occhelli | Designer | 1931 | 1 | |
| Odom, Hunter | Hunter Odom | Actor | 2019 | 1 | |
| Otegui, Juan José | Juan José Otegui | Actor | 1969 | 1 | |
| O'Wisiedo, Mayrata | Mayrata O'Wisiedo | Actor | 1968 | 1 | |
| Ojea, Paca | Paca Ojea | Actor | 2001 | 1 | |
| Otxoa, Iñaki | Iñaki Otxoa | Actor | 1987 | 1 | |
| Ortman, Anders | Anders Ortman | Composer | 2020 | 5 | |
| Okafor, Amaka | Amaka Okafor | Actor | 2020 | 1 | |
| O'Connor, Hugh | Hugh O'Connor | Designer | 2014 | 1 | |
| Oladejo, Oyin | Oyin Oladejo | Actor | 2016 | 1 | |
| Olsen, Kim, Jøran | Kim Jøran Olsen | Actor | 2020 | 1 | |
| Ose, Victoria | Victoria Ose | Actor | 2020 | 2 | |
| Osipova, Nadežda | Nadežda Osipova | Designer | 2016 | 1 | |
| Oščepkov, Artur | Artur Oščepkov | Choreographer | 2013 | 1 | |
| Ostrovskaja, Ljubov' | Ljubov' Ostrovskaja | Actor | 2020 | 1 | |
| Olmedo, Christian | Christian Olmedo | Actor | 2019 - 2020 | 2 | |
| Oliver, Federico | Federico Oliver | Director | 1902 - 1908 | 5 | |
| Omidi, Hossein | Hossein Omidi | Actor | 2013 | 1 | |
| Omrani, Mohammad | Mohammad Omrani | Actor | 2006 | 1 | |
| Omidi, Elena | Elena Omidi | Actor | 2019 | 1 | |
| Ouzeau, Bruno | Bruno Ouzeau | Actor | 2020 | 1 | |
| Oliai, Alireza | Alireza Oliai | | | | |
| Olafsson, Emil | Emil Olafsson | Actor | 2020 | 1 | |
| Odeen-Isbister, Sara | Sara Odeen-Isbister | Actor, Adaptation | 2020 | 2 | |
| Odağ, Efsane | Efsane Odağ | Assistant Director | 2019 | 1 | |
| Omoto, Luka | Luka Omoto | Actor | 2006 | 1 | |
| Obert, Gerti | Gerti Obert | Actor | 1935 | 1 | |
| Oriano, Nanouche | Nanouche Oriano | Puppet Designer, Video Designer | 2016 - 2017 | 8 | |
| Olshin, Abigail | Abigail Olshin | Actor | 2020 | 1 | |
| Orly, Yvonne | Yvonne Orly | Actor | 1935 | 2 | |
| Orii, Akitsu | Akitsu Orii | Musician | 2013 | 1 | |
| Ortscheidt, Mathilde | Mathilde Ortscheidt | Actor | 2014 - 2015 | 2 | |
| Oppenheim, Antoine | Antoine Oppenheim | Director | 2017 | 1 | |
| Olivier, Gérard | Gérard Olivier | Actor | 2016 | 1 | |
| Odle, Cliff | Cliff Odle | Actor | 2021 | 1 | |
| O'Donohue, Nicole | Nicole O'Donohue | Producer | 2015 | 1 | |
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