| O'Neil, Rebecca Pugh Parker | Rebecca Pugh Parker O'Neil | Actor | 2023 | 1 | |
| O'Brien, Denise | Denise O'Brien | Designer | 2023 | 1 | |
| Okin, Matt | Matt Okin | Director | 2023 | 1 | |
| Osokin, Evgeny | Evgeny Osokin (Евгений Осокин) | Actor | 2021 | 1 | |
| Ozeran, Sergey | Sergey Ozeran | Lighting Designer | 2020 | 1 | |
| Ovodok, Vladimir | Vladimir Ovodok | Conductor | 2020 | 1 | |
| Osako, Koji | Koji Osako (大迫浩二) | Lighting Designer | 2023 | 2 | |
| Okehurst, Katie | Katie Okehurst | Actor | 2022 | 1 | |
| Ordóñez, María | María Ordóñez | Actor | 2023 | 1 | |
| Owen, Dan | Dan Owen | Actor | 2021 | 1 | |
| Ozden, Zeynep | Zeynep Ozden | Actor | 2021 | 1 | |
| Oberton , Michael | Michael Oberton | Actor | 2023 | 1 | |
| Oliveira, Inês da Cruz | Inês da Cruz Oliveira | Actor | 2023 | 1 | |
| Oubraham, Nicolas | Nicolas Oubraham | | | | |
| Ortega, Ana Luna | Ana Luna Ortega | Video Designer | 2024 | 1 | |
| Ortiz, Janine | Janine Ortiz | Dramaturg | 2020 | 1 | |
| Oliver, Meagan J. | Meagan J. Oliver | Actor | 2020 | 1 | |
| O'Brian, Vana | Vana O'Brian | Actor | 2019 | 1 | |
| O'Leary, Pascal | Pascal O'Leary | Director | 2024 | 1 | |
| O'Sullivan, Rob | Rob O'Sullivan | Actor | 2024 | 1 | |
| O'Brien, Neal | Neal O'Brien | Actor | 2024 | 1 | |
| Olsen, Kristoffer | Kristoffer Olsen | Actor | 2024 | 1 | |
| Orlandelli, Paolo | Paolo Orlandelli | Assistant Director | 2019 | 1 | |
| Okawa, Tamaki | Tamaki Okawa (Ōkawa Tamaki / 大川珠季) | Dramaturg, Translator | 2024 | 2 | |
| Oppi, Giulio | Giulio Oppi | Actor | 1948 - 1949 | 2 | |
| Olmi, Corrado | Corrado Olmi | Actor | 1977 - 1978 | 8 | |
| Orsini, Luca | Luca Orsini | Assistant Director | 2015 | 1 | |
| Olding, Francesca | Francesca Olding | Actor | 1980 | 3 | |
| Olding, Federico | Federico Olding | Actor | 1980 | 3 | |
| Oliveira, María Clara | María Clara Oliveira | Actor | 2024 | 1 | |
| Orlandini, Gianluca | Gianluca Orlandini | Director | 2003 | 1 | |
| Onnis, Valeria | Valeria Onnis | Costume Designer | 2012 | 2 | |
| Otieno, Mercy Dorcas | Mercy Dorcas Otieno | Actor | 2021 | 2 | |
| Obinu, Gianfranco Onatziro | Gianfranco Onatziro Obinu | Actor | 2015 - 2019 | 3 | |
| Oldani, Claudio | Claudio Oldani | Director | 1991 | 1 | |
| Ori, Benedetta | Benedetta Ori | Actor | 1999 | 2 | |
| Orlandini, Veronica | Veronica Orlandini | Actor | 2015 | 1 | |
| Olivari, Michela | Michela Olivari | Actor | 2018 | 1 | |
| Ornaghi, Simona | Simona Ornaghi | Lighting Designer | 2018 | 2 | |
| Olvera, Omar | Omar Olvera | Director | 2024 | 1 | |
| Olmedo, Darinka | Darinka Olmedo | Actor | 2024 | 1 | |
| Owen, Constance | Constance Owen | Actor | 2024 | 1 | |
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