| Ordonówna, Władysława, | Władysława Ordonówna | Actor | 1904 | 1 | |
| Orea, Mario | Mario Orea | Actor | 1961 | 2 | |
| Oredsson, Thomas | Thomas Oredsson | Actor | 1975 - 1998 | 27 | |
| Orell, Heinrich | Heinrich Orell | Actor, Director | 1911 | 2 | |
| Orella, Francesc | Francesc Orella | Actor | 2007 - 2013 | 11 | |
| Orendy, C. | C. Orendy | Actor | 1920 - 1928 | 3 | |
| Orenstein, Joan | Joan Orenstein | Actor | 1981 - 1989 | 3 | |
| Orenstein, Sarah, | Sarah Orenstein | Actor | 2004 | 1 | |
| Orešković, Želimir | Želimir Orešković | Director | 1975 | 3 | |
| Orfanidis, Stelios | Stelios Orfanidis | Designer | 1949 | 1 | |
| Orfanos, Lampros | Lampros Orfanos | Costume Designer, Designer | 1943 | 2 | |
| Orford, Cathleen, | Cathleen Orford | Actor | 1913 - 1918 | 4 | |
| Orgal, Yehiel | Yehiel Orgal | Lighting Designer | 1995 | 1 | |
| Organ, Alex | Alex Organ | Actor, Sound Designer | 2002 | 2 | |
| Orgill, Paul | Paul Orgill | Actor | 1973 | 1 | |
| Orgulas, Jaanus | Jaanus Orgulas | Actor | 1962 | 1 | |
| Orheian, Vasile Ioan | Vasile Ioan Orheian | Actor | 2009 - 2010 | 1 | |
| Orhon, Coşkun | Coşkun Orhon (Coskun Orhon) | Actor | 1965 - 1972 | 2 | |
| Orhun, Emine | Emine Orhun (Emine Orhun) | Actor | 2007 - 2008 | 1 | |
| Oriane, Francoise | Francoise Oriane | Actor | 1984 | 1 | |
| Orihuela, Belén | Belén Orihuela | Actor | 2009 - 2010 | 1 | |
| Orillac, Sebastian | Sebastian Orillac | Actor | 2010 | 1 | |
| Orion, Elizabeth | Elizabeth Orion | Actor | 1951 | 1 | |
| Oristânio, Giuseppe | Giuseppe Oristânio | Actor | 1997 | 3 | |
| Orkin, Andre | Andre Orkin | Actor | 1944 - 1945 | 1 | |
| Orlac, S. | S. Orlac | Director | 1995 | 1 | |
| Orlac, Stephan | Stephan Orlac | Actor | 1966 | 2 | |
| Orlamundt, Hans, | Hans Orlamundt | Actor | 1877 | 13 | |
| Orlamundt, Kai | Kai Orlamundt | Actor | 1926 | 1 | |
| Orlandersmith, Dael | Dael Orlandersmith | Actor | 1993 | 1 | |
| Orlandini, C., | C. Orlandini | Actor | 1891 | 3 | |
| Orlandini, Claudio | Claudio Orlandini | Director | 2011 | 1 | |
| Orlandini, Leo, | Leo Orlandini | Actor | 1892 - 1924 | 12 | |
| Orlandini, Lia, | Lia Orlandini | Actor | 1921 | 5 | |
| Orléans, Sabine | Sabine Orléans | Actor | 1994 | 3 | |
| Orlemann, Jed | Jed Orlemann | Actor | 2002 | 4 | |
| Orlemann, Philipp | Philipp Orlemann | Actor | 1961 | 1 | |
| Orlenco, Alexej | Alexej Orlenco | Actor | 2011 | 2 | |
| Orleneff, Paul, | Paul Orleneff | Actor | 1906 - 1912 | 7 | |
| Orlenev, Pavel | Pavel Orlenev | Actor, Director | 1903 | 7 | |
| Orley, Ray | Ray Orley | Actor | 1965 | 1 | |
| Orlia, Axel | Axel Orlia | Mask Maker | 1993 | 1 | |
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