| Oliva, Mr. | Mr. Oliva | Actor | 1893 | 1 | |
| Orjas, José | José Orjas | Actor | 1968 | 1 | |
| Olsson, Erik | Erik Olsson | Actor | 2022 | 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 | |
| O'Neil, Rebecca Pugh Parker | Rebecca Pugh Parker O'Neil | Actor | 2023 | 1 | |
| Osokin, Evgeny | Evgeny Osokin (Евгений Осокин) | Actor | 2021 | 1 | |
| 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 | |
| Oliver, Meagan J. | Meagan J. Oliver | Actor | 2020 | 1 | |
| O'Brian, Vana | Vana O'Brian | Actor | 2019 | 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 | |
| Oppi, Giulio | Giulio Oppi | Actor | 1948 - 1949 | 2 | |
| Olmi, Corrado | Corrado Olmi | Actor | 1977 - 1978 | 8 | |
| Olding, Francesca | Francesca Olding | Actor | 1980 | 3 | |
| Olding, Federico | Federico Olding | Actor | 1980 | 3 | |
| Oliveira, María Clara | María Clara Oliveira | Actor | 2024 | 1 | |
| Otieno, Mercy Dorcas | Mercy Dorcas Otieno | Actor | 2021 | 2 | |
| Obinu, Gianfranco Onatziro | Gianfranco Onatziro Obinu | Actor | 2015 - 2019 | 3 | |
| Ori, Benedetta | Benedetta Ori | Actor | 1999 | 2 | |
| Orlandini, Veronica | Veronica Orlandini | Actor | 2015 | 1 | |
| Olivari, Michela | Michela Olivari | Actor | 2018 | 1 | |
| Olmedo, Darinka | Darinka Olmedo | Actor | 2024 | 1 | |
| Owen, Constance | Constance Owen | Actor | 2024 | 1 | |
| Otrębski , Grzegorz | Grzegorz Otrębski | Actor | 2022 | 1 | |
| Otterson, Jed | Jed Otterson | Actor | 2024 | 1 | |
| O’Leary, Helen | Helen O’Leary | Actor | 2018 | 1 | |
| Obzyna, Gertrude | Gertrude Obzyna | | | | |
| Oranjehotel, Het | Het Oranjehotel | | | | |
| ova, Kry | Kry ova | | | | |
| ov!, Luk! | Luk! ov! | | | | |
| Ovtsjinnikova, Olga | Olga Ovtsjinnikova | | | | |
| Olszówka, Edyta | Edyta Olszówka | | | | |
| Ollila, Aune | Aune Ollila | | | | |
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