| Olasz, Lajos | Lajos Olasz | Actor | 1936 | 1 | |
| Olason, Ragnar | Ragnar Olason | Actor | 1956 - 1973 | 48 | |
| Olaru, Orodel | Orodel Olaru | Actor | 2009 | 4 | |
| Olaru, Ion | Ion Olaru | Actor | 1970 | 1 | |
| Olárová, Renata | Renata Olárová | Actor | 1958 | 1 | 1 |
| Olariu, Stelian | Stelian Olariu | Conductor | 2007 | 1 | |
| Olariu, Dana | Dana Olariu | Actor | 2009 - 2015 | 3 | |
| Olarin (Olaru?), Mircea | Mircea Olarin (Olaru?) | Actor | 1956 | 1 | |
| Olander, Sigfrid | Sigfrid Olander | Actor | 1920 | 1 | 1 |
| Olander, Albert | Albert Olander | Actor | 1893 | 2 | |
| Olander, - | - Olander | Actor | 1887 | 1 | |
| Oland, Warner | Warner Oland | Actor | 1906 - 1908 | 5 | 1 |
| Oláh, Vilmos | Vilmos Oláh | Actor | 1988 | 1 | |
| Olafsson, Emil | Emil Olafsson | Actor | 2020 - 2024 | 2 | |
| Olafson, Anne | Anne Olafson | Actor | 2012 | 1 | |
| Olafsen, Carl Fredrik | Carl Fredrik Olafsen | Director | 2010 | 1 | |
| Olafsdottir, Karin | Karin Olafsdottir | Actor | 1957 | 1 | |
| Oladejo, Oyin | Oyin Oladejo | Actor | 2016 | 1 | |
| Ol'čeva, M. | M. Ol'čeva | Actor | 1900 - 1924 | 6 | |
| Okura, Shonosuke | Shonosuke Okura | Actor | 2005 - 2013 | 14 | |
| Okuněv, Alexej | Alexej Okuněv | Actor | 1984 | 1 | |
| Okun, Alexander | Alexander Okun | Designer | 1992 - 2003 | 3 | 1 |
| Okukawa, Koji | Koji Okukawa | Actor | 2008 - 2010 | 5 | |
| Okubo, Ryoichi | Ryoichi Okubo | Actor | 2008 | 1 | |
| Oktav, Burcu | Burcu Oktav | Actor | 2017 | 1 | |
| Okraska, Paweł | Paweł Okraska | Actor | 1999 | 1 | |
| Okpokwasili, Okwui | Okwui Okpokwasili | Actor | 2003 - 2010 | 3 | 1 |
| Okoro, Nija | Nija Okoro | Actor | 2017 | 1 | |
| Okornicki, Kazimierz | Kazimierz Okornicki | Actor, Director | 1908 - 1922 | 7 | |
| Okornicka (Miłosz), Helena | Helena Okornicka (Miłosz) | Actor | 1916 | 1 | |
| Okopiński, Marek | Marek Okopiński | Actor | 1958 | 1 | |
| Okonkwo, Noble | Noble Okonkwo | Actor | 2019 | 1 | |
| Okoli, Ngozi | Ngozi Okoli | Actor | 2002 | 1 | |
| Okkola, Helena | Helena Okkola | Actor | 1998 | 3 | |
| Okking, Jens | Jens Okking | Actor | 1979 - 1984 | 4 | 1 |
| Okkerse, Nico | Nico Okkerse | Actor | 1987 | 1 | |
| Okito, Takashi | Takashi Okito | Actor | 2016 - 2018 | 4 | |
| Okin, Matt | Matt Okin | Director | 2023 | 1 | |
| Okhlupin, Igor | Igor Okhlupin (Игорь Охлупин) | Actor | 2013 | 1 | |
| Okehurst, Katie | Katie Okehurst | Actor | 2022 | 1 | |
| Okazaki, Tomomi | Tomomi Okazaki | Actor | 1967 | 1 | |
| Okazaki, Shinobu | Shinobu Okazaki | Designer | 1991 | 1 | |
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