| Ocaña, Luis | Luis Ocaña | Producer | 1981 | 1 | |
| Ostojic, Biljana | Biljana Ostojic | Director | 1975 | 1 | |
| Op de Beeck, Theo | Theo Op de Beeck | Actor | 1961 | 1 | |
| O'Brien, Joseph | Joseph O'Brien | Actor | 1960 | 1 | |
| Obzina, Martin | Martin Obzina | Director | 1959 | 1 | |
| Osborn, Andrew | Andrew Osborn | Actor | 1951 | 1 | |
| O'Connor, Loyola | Loyola O'Connor | Actor | 1916 | 1 | |
| Ortiz, Gabe | Gabe Ortiz | Actor | 2022 | 1 | |
| Orlando, Carlo | Carlo Orlando | Assistant Director | 2021 | 3 | |
| Oftebro, Jonas Hoff | Jonas Hoff Oftebro | Actor | 2022 | 1 | |
| Ohlinger, Kristie | Kristie Ohlinger | Actor | 2022 | 1 | |
| O'Farrell, Noémie | Noémie O'Farrell | Actor | 2022 | 2 | |
| Omerović, Aldin | Aldin Omerović | Actor | 2022 | 1 | |
| Oleksikiw, Silvia | Silvia Oleksikiw | Producer | 2022 | 1 | |
| O’Rourke, Rylee | Rylee O’Rourke | Assistant Director, Producer | 2020 - 2022 | 2 | |
| O'Malley, Cathleen | Cathleen O'Malley | Assistant Director | 2022 | 1 | |
| Orozco, Carolina | Carolina Orozco | Actor | 2022 | 1 | |
| Ortenzi, Oriana | Oriana Ortenzi | Actor | 2022 - 2024 | 2 | |
| Ou, Daisy | Daisy Ou | Actor | 2022 | 1 | |
| Olsen, Brian | Brian Olsen | Actor | 2022 | 2 | |
| Ottinger , Matt | Matt Ottinger | Video Designer | 2022 | 1 | |
| O'Brien, Meredith | Meredith O'Brien | Actor | 2022 | 1 | |
| Ooi, Mike | Mike Ooi | Actor | 2022 | 1 | |
| Ortiz, Carolina | Carolina Ortiz | Lighting Designer | 2022 | 1 | |
| Ošavkova, Sonja | Sonja Ošavkova (Соња Ошавкова) | Actor | 2013 | 1 | |
| Osmani, Blerim | Blerim Osmani (Блерим Османи) | Musician | 2022 | 1 | |
| Olivar, Mr | Mr Olivar | Actor | 1900 | 2 | |
| Ouisem, Abdellaoui | Abdellaoui Ouisem | Actor | 2022 | 1 | |
| Oteyza, Ramón | Ramón Oteyza | Actor | 1975 | 1 | |
| Olier, Luz | Luz Olier | Actor | 2016 | 8 | |
| Olteanu , Stefan | Stefan Olteanu | Actor | 2022 | 1 | |
| Oliva, Mr. | Mr. Oliva | Actor | 1893 | 1 | |
| Ochoa, José | José Ochoa | Adaptation, Director | 1974 - 1975 | 10 | |
| Ocano, Armando | Armando Ocano | Adaptation | 1975 - 1980 | 5 | |
| Orjas, José | José Orjas | Actor | 1968 | 1 | |
| Olsson, Erik | Erik Olsson | Actor | 2022 | 1 | |
| O’Connor, Francis | Francis O’Connor | Set Designer | 2023 | 1 | |
| O’Clery, Joan | Joan O’Clery | Costume Designer | 2023 | 1 | |
| Oen, Hermine Svortevik | Hermine Svortevik Oen | Actor | 2024 | 1 | |
| Odegaard, Elin | Elin Odegaard | Actor | 2023 | 1 | |
| Onaodowan, Okierite | Okierite Onaodowan | Actor | 2023 | 1 | |
| Occomore, Nye | Nye Occomore | Actor | 2023 | 1 | |
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