| Olohan, John | John Olohan | Actor | 1980 | 16 | |
| O'Hanlon, Máire | Máire O'Hanlon | Actor | 1980 | 16 | |
| Ortíz, Nancy | Nancy Ortíz | Actor | 1980 | 1 | |
| Ortíz, Norma-Norma | Norma-Norma Ortíz | Actor | 1980 | 1 | |
| Osske, Tamara | Tamara Osske | Actor | 1980 | 1 | |
| O'Mara, Kate | Kate O'Mara | Actor | 1981 | 1 | |
| Osorio, Silvia | Silvia Osorio | Actor | 1981 | 1 | |
| Ohsaka, Hidemi | Hidemi Ohsaka | Actor | 1984 | 1 | |
| Olivero, Franco | Franco Olivero | Actor | 1986 | 2 | |
| Oberländer, Heinrich | Heinrich Oberländer | Actor | 1891 | 1 | |
| Oguri, Yuriko | Yuriko Oguri | Actor | 1990 | 1 | |
| O'Neill, Daniel | Daniel O'Neill | Actor | 2013 | 1 | |
| O'Mara, Mollie | Mollie O'Mara | Actor | 1993 | 1 | |
| Orlandersmith, Dael | Dael Orlandersmith | Actor | 1993 | 1 | |
| Otto, Götz | Götz Otto | Actor | 1993 | 1 | |
| Orléans, Sabine | Sabine Orléans | Actor | 1994 | 3 | |
| Orhun, Emine | Emine Orhun | Actor | 2007 | 1 | |
| Olmar, Gustav | Gustav Olmar | Actor | 1896 | 1 | |
| Oppel, Heinrich | Heinrich Oppel | Actor | 1889 | 2 | |
| Ohl, Malte | Malte Ohl | Actor | 1999 | 1 | |
| Olcay, Emin | Emin Olcay | Actor | 1987 | 1 | |
| Okazaki, Satsuki | Satsuki Okazaki | Actor | 2017 | 4 | |
| Olbers, Frk. | Frk. Olbers | Actor | 1880 | 1 | |
| O'Connor, Zach | Zach O'Connor | Actor | 2018 | 1 | |
| Otto, Karl | Karl Otto | Actor | 1910 - 1911 | 2 | |
| O'Berski, Jaybird | Jaybird O'Berski | Actor | 2018 | 1 | |
| Opzoomer, India | India Opzoomer | Actor | 2018 | 1 | |
| Orwell, Harry | Harry Orwell | Actor | 2018 | 1 | |
| Ottepp, Alexander | Alexander Ottepp | Actor | 1891 | 1 | |
| O'Connor, Herbert | Herbert O'Connor | Actor | 1906 | 1 | |
| O'Shea, James | James O'Shea | Actor | 1905 | 1 | |
| Ortega, Jessie, Montoya | Jessie Montoya Ortega | Actor | 2018 | 1 | |
| Oakleaf, Donovan | Donovan Oakleaf | Actor | 2018 | 1 | |
| O'Donnell, Mary Katherine | Mary Katherine O'Donnell | Actor | 2018 | 1 | |
| Olson, Andrew | Andrew Olson | Actor | 2018 | 6 | |
| Ono, Toshiaki | Toshiaki Ono | Actor | 2018 | 1 | |
| Ogden, Betty | Betty Ogden | Actor | 1969 - 1972 | 2 | |
| O'Connor, Paul | Paul O'Connor | Actor | 1969 | 1 | |
| Oxley, Matt | Matt Oxley | Actor | 2018 | 1 | |
| Oikonomaki, Grigoria | Grigoria Oikonomaki | Actor | 2018 | 1 | |
| Orchard, Mandy | Mandy Orchard | Actor | 2018 | 1 | |
| Oie, Austin | Austin Oie | Actor | 2016 | 1 | |
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